Add GPIO header file + a little bit of GPIO configuration logig
This commit is contained in:
Gregory Nutt
parent
3896f187a6
commit
2a7edd7e1c
1481
arch/arm/src/efm32/chip/efm32_gpio.h
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1481
arch/arm/src/efm32/chip/efm32_gpio.h
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@ -49,10 +49,133 @@
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* Pre-processor Definitions
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************************************************************************************/
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#define __GPIO_INPUT (1 << 0) /* Bit 0: GPIO is an input */
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#define __GPIO_OUTPUT (1 << 1) /* Bit 1: GPIO is an output */
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#define __GPIO_DOUT (1 << 2) /* Bit 2: An input modified with DOUT setting */
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#define __GPIO_DRIVE (1 << 3) /* Bit 3: An output with drive selection */
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/************************************************************************************
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* Public Data
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* Private Data
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************************************************************************************/
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static const uint8_t g_gpiomode[16] =
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{
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(__GPIO_DOUT), /* 0 DISABLED Input disabled. Pullup if DOUT is
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* set. */
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(__GPIO_INPUT | __GPIO_DOUT), /* 1 INPUT Input enabled. Filter if DOUT is set. */
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(__GPIO_INPUT | __GPIO_DOUT), /* 2 INPUTPULL Input enabled. DOUT determines pull
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* direction */
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(__GPIO_INPUT | __GPIO_DOUT), /* 3 INPUTPULLFILTER Input enabled with filter.
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* COUT determines pull direction */
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(__GPIO_OUTPUT), /* 4 PUSHPULL Push-pull output */
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(__GPIO_OUTPUT | __GPIO_DRIVE), /* 5 PUSHPULLDRIVE Push-pull output with drive-
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* strength set by DRIVEMODE */
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(__GPIO_OUTPUT), /* 6 WIREDOR Wired-or output */
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(__GPIO_OUTPUT), /* 7 WIREDORPULLDOWN Wired-or output with pull-
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* down */
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(__GPIO_OUTPUT), /* 8 WIREDAND Open-drain output */
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(__GPIO_OUTPUT), /* 9 WIREDANDFILTER Open-drain output with filter */
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(__GPIO_OUTPUT), /* 10 WIREDANDPULLUP Open-drain output with pullup */
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(__GPIO_OUTPUT), /* 11 WIREDANDPULLUPFILTER Open-drain output with
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* filter and pullup */
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(__GPIO_OUTPUT | __GPIO_DRIVE), /* 12 WIREDANDDRIVE Open-drain output with
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* drive-strength set by DRIVEMODE */
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(__GPIO_OUTPUT | __GPIO_DRIVE), /* 13 WIREDANDDRIVEFILTER Open-drain output with
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* filter and drive-strength set by DRIVEMODE */
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(__GPIO_OUTPUT | __GPIO_DRIVE), /* 14 WIREDANDDRIVEPULLUP Open-drain output with
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* pullup and drive-strength set by DRIVEMODE */
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(__GPIO_OUTPUT | __GPIO_DRIVE) /* 15 WIREDANDDRIVEPULLUPFILTER Open-drain output
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* with filter, pullup and drive-strength set
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* by DRIVEMODE */
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};
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Name: efm32_port
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*
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* Description:
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* Extract the encoded port number
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*
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************************************************************************************/
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static inline uint8_t efm32_port(gpio_pinset_t cfgset)
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{
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return (uint8_t)((cfgset & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT);
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}
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/************************************************************************************
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* Name: efm32_pin
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*
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* Description:
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* Extract the encoded pin number
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*
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************************************************************************************/
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static inline uint8_t efm32_pin(gpio_pinset_t cfgset)
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{
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return (uint8_t)((cfgset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT);
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}
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/************************************************************************************
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* Name: efm32_mode
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*
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* Description:
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* Extract the encoded pin mode
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*
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************************************************************************************/
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static inline uint8_t efm32_pin(gpio_pinset_t cfgset)
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{
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return (uint8_t)((cfgset & GPIO_PIN_MASK) >> GPIO_PIN_SHIFT);
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}
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/************************************************************************************
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* Name: efm32_drivestrength
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*
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* Description:
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* Extract the output drive strength
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*
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************************************************************************************/
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static uint8_t efm32_drivestrength(uint8_t mode, gpio_pinset_t cfgset)
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{
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if ((g_gpiomode[mode] & __GPIO_DRIVE) != 0)
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{
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return (uint8_t)((cfgset & GPIO_DRIVE_MASK) >> GPIO_DRIVE_SHIFT);
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}
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else
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{
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return _GPIO_DRIVE_STANDARD;
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}
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}
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/************************************************************************************
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* Name: efm32_dout
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*
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* Description:
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* Extract the encoded port number
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*
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************************************************************************************/
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static uint8_t efm32_dout(uint8_t mode, gpio_pinset_t cfgset)
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{
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if ((g_gpiomode[mode] & __GPIO_DOUT) != 0)
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{
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return (uint8_t)((cfgset >> GPIO_MODE_DOUT_SHIFT) & 1);
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}
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else if ((g_gpiomode[mode] & __GPIO_OUTPUT) != 0)
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{
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return (uint8_t)((cfgset >> GPIO_OUTPUT_SHIFT) & 1);
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}
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else
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{
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return 0;
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}
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}
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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@ -67,6 +190,12 @@
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int efm32_configgpio(gpio_pinset_t cfgset)
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{
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uint8_t port = efm32_pin(cfgset);
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uint8_t pin = efm32_port(cfgset);
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uint8_t mode = efm32_mode(cfgset);
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uint8_t drive = efm32_drivestrength(mode, cfgset);
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uint8_t dout = efm32_dout(mode, cfgset);
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#warning Missing logic
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return -ENOSYS;
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}
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@ -71,7 +71,10 @@
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#define GPIO_MODE_SHIFT (12) /* Bits 12-15: Port mode */
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#define GPIO_MODE_MASK (15 << GPIO_MODE_SHIFT)
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#define GPIO_MODE_DOUT (1 << 11) /* DOUT input mode modifier */
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#define GPIO_MODE_DOUT_SHIFT (11) /* Bit 11: Input mode modifer */
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#define GPIO_MODE_DOUT_MASK (1 << GPIO_MODE_DOUT_SHIFT)
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# define GPIO_MODE_DOUT GPIO_MODE_DOUT_MASK
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/* Input modes */
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@ -127,8 +130,10 @@
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* .... V... .... ....
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*/
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#define GPIO_OUTPUT_SET (1 << 11) /* Bit 11: Initial value of output */
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#define GPIO_OUTPUT_CLEAR (0)
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#define GPIO_OUTPUT_SHIFT (11) /* Bit 11: Initial value of output */
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#define GPIO_OUTPUT_MASK (1 << GPIO_OUTPUT_SHIFT)
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# define GPIO_OUTPUT_SET GPIO_OUTPUT_MASK
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# define GPIO_OUTPUT_CLEAR (0)
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/* Output drive:
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*
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@ -137,10 +142,14 @@
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#define GPIO_DRIVE_SHIFT (9) /* Bits 9-10: Output drive strength */
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#define GPIO_DRIVE_MASK (3 << GPIO_MODE_SHIFT)
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# define GPIO_DRIVE_STANDARD (0 << GPIO_MODE_SHIFT) /* 6 mA drive current */
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# define GPIO_DRIVE_LOWEST (1 << GPIO_MODE_SHIFT) /* 0.5 mA drive current */
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# define GPIO_DRIVE_HIGH (2 << GPIO_MODE_SHIFT) /* 20 mA drive current */
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# define GPIO_DRIVE_LOW (3 << GPIO_MODE_SHIFT) /* 2 mA drive current */
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# define _GPIO_DRIVE_STANDARD (0) /* 6 mA drive current */
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# define _GPIO_DRIVE_LOWEST (1) /* 0.5 mA drive current */
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# define _GPIO_DRIVE_HIGH (2) /* 20 mA drive current */
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# define _GPIO_DRIVE_LOW (3) /* 2 mA drive current */
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# define GPIO_DRIVE_STANDARD (_GPIO_DRIVE_STANDARD << GPIO_MODE_SHIFT)
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# define GPIO_DRIVE_LOWEST (_GPIO_DRIVE_LOWEST << GPIO_MODE_SHIFT)
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# define GPIO_DRIVE_HIGH (_GPIO_DRIVE_HIGH << GPIO_MODE_SHIFT)
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# define GPIO_DRIVE_LOW (_GPIO_DRIVE_LOW << GPIO_MODE_SHIFT)
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/* Interrupt Mode (Input only):
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*
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@ -158,7 +167,7 @@
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* .... .... .PPP ....
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*/
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#define GPIO_PORT_SHIFT (4) /* Bit 4-7: Port number */
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#define GPIO_PORT_SHIFT (4) /* Bit 4-6: Port number */
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#define GPIO_PORT_MASK (7 << GPIO_PORT_SHIFT)
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# define GPIO_PORTA (0 << GPIO_PORT_SHIFT)
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# define GPIO_PORTB (1 << GPIO_PORT_SHIFT)
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@ -173,23 +182,23 @@
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*/
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#define GPIO_PIN_SHIFT (0) /* Bits 0-3: Pin number: 0-15 */
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#define GPIO_PIN_MASK (31 << GPIO_PIN_SHIFT)
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#define GPIO_PIN0 (0 << GPIO_PIN_SHIFT)
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#define GPIO_PIN1 (1 << GPIO_PIN_SHIFT)
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#define GPIO_PIN2 (2 << GPIO_PIN_SHIFT)
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#define GPIO_PIN3 (3 << GPIO_PIN_SHIFT)
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#define GPIO_PIN4 (4 << GPIO_PIN_SHIFT)
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#define GPIO_PIN5 (5 << GPIO_PIN_SHIFT)
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#define GPIO_PIN6 (6 << GPIO_PIN_SHIFT)
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#define GPIO_PIN7 (7 << GPIO_PIN_SHIFT)
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#define GPIO_PIN8 (8 << GPIO_PIN_SHIFT)
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#define GPIO_PIN9 (9 << GPIO_PIN_SHIFT)
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#define GPIO_PIN10 (10 << GPIO_PIN_SHIFT)
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#define GPIO_PIN11 (11 << GPIO_PIN_SHIFT)
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#define GPIO_PIN12 (12 << GPIO_PIN_SHIFT)
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#define GPIO_PIN13 (13 << GPIO_PIN_SHIFT)
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#define GPIO_PIN14 (14 << GPIO_PIN_SHIFT)
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#define GPIO_PIN15 (15 << GPIO_PIN_SHIFT)
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#define GPIO_PIN_MASK (15 << GPIO_PIN_SHIFT)
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# define GPIO_PIN0 (0 << GPIO_PIN_SHIFT)
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# define GPIO_PIN1 (1 << GPIO_PIN_SHIFT)
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# define GPIO_PIN2 (2 << GPIO_PIN_SHIFT)
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# define GPIO_PIN3 (3 << GPIO_PIN_SHIFT)
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# define GPIO_PIN4 (4 << GPIO_PIN_SHIFT)
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# define GPIO_PIN5 (5 << GPIO_PIN_SHIFT)
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# define GPIO_PIN6 (6 << GPIO_PIN_SHIFT)
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# define GPIO_PIN7 (7 << GPIO_PIN_SHIFT)
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# define GPIO_PIN8 (8 << GPIO_PIN_SHIFT)
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# define GPIO_PIN9 (9 << GPIO_PIN_SHIFT)
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# define GPIO_PIN10 (10 << GPIO_PIN_SHIFT)
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# define GPIO_PIN11 (11 << GPIO_PIN_SHIFT)
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# define GPIO_PIN12 (12 << GPIO_PIN_SHIFT)
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# define GPIO_PIN13 (13 << GPIO_PIN_SHIFT)
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# define GPIO_PIN14 (14 << GPIO_PIN_SHIFT)
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# define GPIO_PIN15 (15 << GPIO_PIN_SHIFT)
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/************************************************************************************
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* Public Types
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