/**************************************************************************** * boards/arm/stm32f7/stm32f746g-disco/include/board.h * * Copyright (C) 2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ #ifndef __BOARDS_ARM_STM32F7_STM32F746G_DISCO_INCLUDE_BOARD_H #define __BOARDS_ARM_STM32F7_STM32F746G_DISCO_INCLUDE_BOARD_H /**************************************************************************** * Included Files ****************************************************************************/ #include #ifndef __ASSEMBLY__ # include #endif /* No not include STM32 F7 header files here. */ /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Clocking *****************************************************************/ /* The STM32F7 Discovery board provides the following clock sources: * * X1: 24 MHz oscillator for USB OTG HS PHY and camera module (daughter board) * X2: 25 MHz oscillator for STM32F746NGH6 microcontroller and Ethernet PHY. * X3: 32.768 KHz crystal for STM32F746NGH6 embedded RTC * * So we have these clock source available within the STM32 * * HSI: 16 MHz RC factory-trimmed * LSI: 32 KHz RC * HSE: On-board crystal frequency is 25MHz * LSE: 32.768 kHz */ #define STM32_BOARD_XTAL 25000000ul #define STM32_HSI_FREQUENCY 16000000ul #define STM32_LSI_FREQUENCY 32000 #define STM32_HSE_FREQUENCY STM32_BOARD_XTAL #define STM32_LSE_FREQUENCY 32768 /* Main PLL Configuration. * * PLL source is HSE = 25,000,000 * * PLL_VCO = (STM32_HSE_FREQUENCY / PLLM) * PLLN * Subject to: * * 2 <= PLLM <= 63 * 192 <= PLLN <= 432 * 192 MHz <= PLL_VCO <= 432MHz * * SYSCLK = PLL_VCO / PLLP * Subject to * * PLLP = {2, 4, 6, 8} * SYSCLK <= 216 MHz * * USB OTG FS, SDMMC and RNG Clock = PLL_VCO / PLLQ * Subject to * The USB OTG FS requires a 48 MHz clock to work correctly. The SDMMC * and the random number generator need a frequency lower than or equal * to 48 MHz to work correctly. * * 2 <= PLLQ <= 15 */ #if defined(CONFIG_STM32F7_OTGFS) /* Highest SYSCLK with USB OTG FS clock = 48 MHz * * PLL_VCO = (25,000,000 / 25) * 384 = 384 MHz * SYSCLK = 384 MHz / 2 = 192 MHz * USB OTG FS, SDMMC and RNG Clock = 384 MHz / 8 = 48MHz */ #define STM32_PLLCFG_PLLM RCC_PLLCFG_PLLM(25) #define STM32_PLLCFG_PLLN RCC_PLLCFG_PLLN(384) #define STM32_PLLCFG_PLLP RCC_PLLCFG_PLLP_2 #define STM32_PLLCFG_PLLQ RCC_PLLCFG_PLLQ(8) #define STM32_VCO_FREQUENCY ((STM32_HSE_FREQUENCY / 25) * 384) #define STM32_SYSCLK_FREQUENCY (STM32_VCO_FREQUENCY / 2) #define STM32_OTGFS_FREQUENCY (STM32_VCO_FREQUENCY / 8) #elif defined(CONFIG_STM32F7_SDMMC1) || defined(CONFIG_STM32F7_RNG) /* Highest SYSCLK with USB OTG FS clock <= 48MHz * * PLL_VCO = (25,000,000 / 25) * 432 = 432 MHz * SYSCLK = 432 MHz / 2 = 216 MHz * USB OTG FS, SDMMC and RNG Clock = 432 MHz / 10 = 43.2 MHz */ #define STM32_PLLCFG_PLLM RCC_PLLCFG_PLLM(25) #define STM32_PLLCFG_PLLN RCC_PLLCFG_PLLN(432) #define STM32_PLLCFG_PLLP RCC_PLLCFG_PLLP_2 #define STM32_PLLCFG_PLLQ RCC_PLLCFG_PLLQ(10) #define STM32_VCO_FREQUENCY ((STM32_HSE_FREQUENCY / 25) * 432) #define STM32_SYSCLK_FREQUENCY (STM32_VCO_FREQUENCY / 2) #define STM32_OTGFS_FREQUENCY (STM32_VCO_FREQUENCY / 10) #else /* Highest SYSCLK * * PLL_VCO = (25,000,000 / 25) * 432 = 432 MHz * SYSCLK = 432 MHz / 2 = 216 MHz */ #define STM32_PLLCFG_PLLM RCC_PLLCFG_PLLM(25) #define STM32_PLLCFG_PLLN RCC_PLLCFG_PLLN(432) #define STM32_PLLCFG_PLLP RCC_PLLCFG_PLLP_2 #define STM32_PLLCFG_PLLQ RCC_PLLCFG_PLLQ(10) #define STM32_VCO_FREQUENCY ((STM32_HSE_FREQUENCY / 25) * 432) #define STM32_SYSCLK_FREQUENCY (STM32_VCO_FREQUENCY / 2) #define STM32_OTGFS_FREQUENCY (STM32_VCO_FREQUENCY / 10) #endif /* Configure factors for PLLSAI clock */ #define STM32_RCC_PLLSAICFGR_PLLSAIN RCC_PLLSAICFGR_PLLSAIN(BOARD_LTDC_PLLSAIN) #define STM32_RCC_PLLSAICFGR_PLLSAIP RCC_PLLSAICFGR_PLLSAIP(2) #define STM32_RCC_PLLSAICFGR_PLLSAIQ RCC_PLLSAICFGR_PLLSAIQ(2) #define STM32_RCC_PLLSAICFGR_PLLSAIR RCC_PLLSAICFGR_PLLSAIR(BOARD_LTDC_PLLSAIR) /* Configure Dedicated Clock Configuration Register */ #define STM32_RCC_DCKCFGR1_PLLI2SDIVQ RCC_DCKCFGR1_PLLI2SDIVQ(1) #define STM32_RCC_DCKCFGR1_PLLSAIDIVQ RCC_DCKCFGR1_PLLSAIDIVQ(1) #define STM32_RCC_DCKCFGR1_PLLSAIDIVR RCC_DCKCFGR1_PLLSAIDIVR(1) #define STM32_RCC_DCKCFGR1_SAI1SRC RCC_DCKCFGR1_SAI1SEL(0) #define STM32_RCC_DCKCFGR1_SAI2SRC RCC_DCKCFGR1_SAI2SEL(0) #define STM32_RCC_DCKCFGR1_TIMPRESRC 0 #define STM32_RCC_DCKCFGR1_DFSDM1SRC 0 #define STM32_RCC_DCKCFGR1_ADFSDM1SRC 0 /* Configure factors for PLLI2S clock */ #define STM32_RCC_PLLI2SCFGR_PLLI2SN RCC_PLLI2SCFGR_PLLI2SN(192) #define STM32_RCC_PLLI2SCFGR_PLLI2SP RCC_PLLI2SCFGR_PLLI2SP(2) #define STM32_RCC_PLLI2SCFGR_PLLI2SQ RCC_PLLI2SCFGR_PLLI2SQ(2) #define STM32_RCC_PLLI2SCFGR_PLLI2SR RCC_PLLI2SCFGR_PLLI2SR(2) /* Configure Dedicated Clock Configuration Register 2 */ #define STM32_RCC_DCKCFGR2_USART1SRC RCC_DCKCFGR2_USART1SEL_APB #define STM32_RCC_DCKCFGR2_USART2SRC RCC_DCKCFGR2_USART2SEL_APB #define STM32_RCC_DCKCFGR2_UART4SRC RCC_DCKCFGR2_UART4SEL_APB #define STM32_RCC_DCKCFGR2_UART5SRC RCC_DCKCFGR2_UART5SEL_APB #define STM32_RCC_DCKCFGR2_USART6SRC RCC_DCKCFGR2_USART6SEL_APB #define STM32_RCC_DCKCFGR2_UART7SRC RCC_DCKCFGR2_UART7SEL_APB #define STM32_RCC_DCKCFGR2_UART8SRC RCC_DCKCFGR2_UART8SEL_APB #define STM32_RCC_DCKCFGR2_I2C1SRC RCC_DCKCFGR2_I2C1SEL_HSI #define STM32_RCC_DCKCFGR2_I2C2SRC RCC_DCKCFGR2_I2C2SEL_HSI #define STM32_RCC_DCKCFGR2_I2C3SRC RCC_DCKCFGR2_I2C3SEL_HSI #define STM32_RCC_DCKCFGR2_I2C4SRC RCC_DCKCFGR2_I2C4SEL_HSI #define STM32_RCC_DCKCFGR2_LPTIM1SRC RCC_DCKCFGR2_LPTIM1SEL_APB #define STM32_RCC_DCKCFGR2_CECSRC RCC_DCKCFGR2_CECSEL_HSI #define STM32_RCC_DCKCFGR2_CK48MSRC RCC_DCKCFGR2_CK48MSEL_PLLSAI #define STM32_RCC_DCKCFGR2_SDMMCSRC RCC_DCKCFGR2_SDMMCSEL_48MHZ #define STM32_RCC_DCKCFGR2_SDMMC2SRC RCC_DCKCFGR2_SDMMC2SEL_48MHZ /* Several prescalers allow the configuration of the two AHB buses, the * high-speed APB (APB2) and the low-speed APB (APB1) domains. The maximum * frequency of the two AHB buses is 216 MHz while the maximum frequency of * the high-speed APB domains is 108 MHz. The maximum allowed frequency of * the low-speed APB domain is 54 MHz. */ /* AHB clock (HCLK) is SYSCLK (216 MHz) */ #define STM32_RCC_CFGR_HPRE RCC_CFGR_HPRE_SYSCLK /* HCLK = SYSCLK / 1 */ #define STM32_HCLK_FREQUENCY STM32_SYSCLK_FREQUENCY #define STM32_BOARD_HCLK STM32_HCLK_FREQUENCY /* same as above, to satisfy compiler */ /* APB1 clock (PCLK1) is HCLK/4 (54 MHz) */ #define STM32_RCC_CFGR_PPRE1 RCC_CFGR_PPRE1_HCLKd4 /* PCLK1 = HCLK / 4 */ #define STM32_PCLK1_FREQUENCY (STM32_HCLK_FREQUENCY/4) /* Timers driven from APB1 will be twice PCLK1 */ #define STM32_APB1_TIM2_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM3_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM4_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM5_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM6_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM7_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM12_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM13_CLKIN (2*STM32_PCLK1_FREQUENCY) #define STM32_APB1_TIM14_CLKIN (2*STM32_PCLK1_FREQUENCY) /* APB2 clock (PCLK2) is HCLK/2 (108MHz) */ #define STM32_RCC_CFGR_PPRE2 RCC_CFGR_PPRE2_HCLKd2 /* PCLK2 = HCLK / 2 */ #define STM32_PCLK2_FREQUENCY (STM32_HCLK_FREQUENCY/2) /* Timers driven from APB2 will be twice PCLK2 */ #define STM32_APB2_TIM1_CLKIN (2*STM32_PCLK2_FREQUENCY) #define STM32_APB2_TIM8_CLKIN (2*STM32_PCLK2_FREQUENCY) #define STM32_APB2_TIM9_CLKIN (2*STM32_PCLK2_FREQUENCY) #define STM32_APB2_TIM10_CLKIN (2*STM32_PCLK2_FREQUENCY) #define STM32_APB2_TIM11_CLKIN (2*STM32_PCLK2_FREQUENCY) /* FLASH wait states * * --------- ---------- ----------- * VDD MAX SYSCLK WAIT STATES * --------- ---------- ----------- * 1.7-2.1 V 180 MHz 8 * 2.1-2.4 V 216 MHz 9 * 2.4-2.7 V 216 MHz 8 * 2.7-3.6 V 216 MHz 7 * --------- ---------- ----------- */ #define BOARD_FLASH_WAITSTATES 7 /* LED definitions **********************************************************/ /* The STM32F746G-DISCO board has numerous LEDs but only one, LD1 located * near the reset button, that can be controlled by software (LD2 is a power * indicator, LD3-6 indicate USB status, LD7 is controlled by the ST-Link). * * LD1 is controlled by PI1 which is also the SPI2_SCK at the Arduino interface. * One end of LD1 is grounded so a high output on PI1 will illuminate the LED. * * If CONFIG_ARCH_LEDS is not defined, then the user can control the LEDs in any way. * The following definitions are used to access individual LEDs. */ /* LED index values for use with board_userled() */ #define BOARD_LED1 0 #define BOARD_NLEDS 1 #define BOARD_LD1 BOARD_LED1 /* LED bits for use with board_userled_all() */ #define BOARD_LED1_BIT (1 << BOARD_LED1) /* If CONFIG_ARCH_LEDS is defined, the usage by the board port is defined in * include/board.h and src/stm32_leds.c. The LEDs are used to encode OS-related * events as follows: * * SYMBOL Meaning LD1 * ------------------- ----------------------- ------ * LED_STARTED NuttX has been started OFF * LED_HEAPALLOCATE Heap has been allocated OFF * LED_IRQSENABLED Interrupts enabled OFF * LED_STACKCREATED Idle stack created ON * LED_INIRQ In an interrupt N/C * LED_SIGNAL In a signal handler N/C * LED_ASSERTION An assertion failed N/C * LED_PANIC The system has crashed FLASH * * Thus is LD1 is statically on, NuttX has successfully booted and is, * apparently, running normally. If LD1 is flashing at approximately * 2Hz, then a fatal error has been detected and the system has halted. */ #define LED_STARTED 0 /* LD1=OFF */ #define LED_HEAPALLOCATE 0 /* LD1=OFF */ #define LED_IRQSENABLED 0 /* LD1=OFF */ #define LED_STACKCREATED 1 /* LD1=ON */ #define LED_INIRQ 2 /* LD1=no change */ #define LED_SIGNAL 2 /* LD1=no change */ #define LED_ASSERTION 2 /* LD1=no change */ #define LED_PANIC 3 /* LD1=flashing */ /* Button definitions *******************************************************/ /* The STM32F7 Discovery supports one button: * Pushbutton B1, labelled "User", is connected to GPIO PI11. * A high value will be sensed when the button is depressed. */ #define BUTTON_USER 0 #define NUM_BUTTONS 1 #define BUTTON_USER_BIT (1 << BUTTON_USER) /* Alternate function pin selections ****************************************/ /* USART6: * * These configurations assume that you are using a standard Arduio RS-232 * shield with the serial interface with RX on pin D0 and TX on pin D1: * * -------- --------------- * STM32F7 * ARDUIONO FUNCTION GPIO * -- ----- --------- ----- * DO RX USART6_RX PC7 * D1 TX USART6_TX PC6 * -- ----- --------- ----- */ #define GPIO_USART6_RX GPIO_USART6_RX_1 #define GPIO_USART6_TX GPIO_USART6_TX_1 /* USART1: * * USART1 is connected to the "Virtual Com Port" lines of the ST-LINK controller. * * -------- --------------- * STM32F7 * SIGNAME FUNCTION GPIO * -- ----- --------- ----- * VCP_RX USART1_RX PB7 * VCP_TX USART1_TX PA9 * -- ----- --------- ----- */ #define GPIO_USART1_RX GPIO_USART1_RX_2 #define GPIO_USART1_TX GPIO_USART1_TX_1 /* I2C1 - the I2C1 bus is shared by audio (Cirrus WM8994), * camera (DCMI SDA/SCL) and external connectors CN2 & Arduino D14/D15. */ #define GPIO_I2C1_SDA GPIO_I2C1_SDA_2 #define GPIO_I2C1_SCL GPIO_I2C1_SCL_2 /* I2C - There is a FT5336 TouchPanel on I2C3 using these pins: */ #define GPIO_I2C3_SCL GPIO_I2C3_SCL_2 #define GPIO_I2C3_SDA GPIO_I2C3_SDA_2 #define GPIO_TP_INT (GPIO_INPUT|GPIO_FLOAT|GPIO_EXTI|GPIO_PORTI|GPIO_PIN13) #define FT5x06_I2C_ADDRESS 0x38 /* The STM32 F7 connects to a SMSC LAN8742A PHY using these pins: * * STM32 F7 BOARD LAN8742A * GPIO SIGNAL PIN NAME * -------- ------------ ------------- * PG11 RMII_TX_EN TXEN * PG13 RMII_TXD0 TXD0 * PG14 RMII_TXD1 TXD1 * PC4 RMII_RXD0 RXD0/MODE0 * PC5 RMII_RXD1 RXD1/MODE1 * PG2 RMII_RXER RXER/PHYAD0 -- Not used * PA7 RMII_CRS_DV CRS_DV/MODE2 * PC1 RMII_MDC MDC * PA2 RMII_MDIO MDIO * N/A NRST nRST * PA1 RMII_REF_CLK nINT/REFCLK0 * N/A OSC_25M XTAL1/CLKIN * * The PHY address is either 0 or 1, depending on the state of PG2 on reset. * PG2 is not controlled but appears to result in a PHY address of 0. */ #define GPIO_ETH_RMII_TX_EN GPIO_ETH_RMII_TX_EN_2 #define GPIO_ETH_RMII_TXD0 GPIO_ETH_RMII_TXD0_2 #define GPIO_ETH_RMII_TXD1 GPIO_ETH_RMII_TXD1_2 /* LCD definitions **********************************************************/ #define BOARD_LTDC_WIDTH 480 #define BOARD_LTDC_HEIGHT 272 #define BOARD_LTDC_OUTPUT_BPP 24 #define BOARD_LTDC_HFP 32 #define BOARD_LTDC_HBP 13 #define BOARD_LTDC_VFP 2 #define BOARD_LTDC_VBP 2 #define BOARD_LTDC_HSYNC 41 #define BOARD_LTDC_VSYNC 10 #define BOARD_LTDC_PLLSAIN 192 #define BOARD_LTDC_PLLSAIR 5 /* Pixel Clock Polarity */ #define BOARD_LTDC_GCR_PCPOL 0 /* !LTDC_GCR_PCPOL */ /* Data Enable Polarity */ #define BOARD_LTDC_GCR_DEPOL 0 /* !LTDC_GCR_DEPOL */ /* Vertical Sync Polarity */ #define BOARD_LTDC_GCR_VSPOL 0 /* !LTDC_GCR_VSPOL */ /* Horizontal Sync Polarity */ #define BOARD_LTDC_GCR_HSPOL 0 /* !LTDC_GCR_HSPOL */ /* GPIO pinset */ #define GPIO_LTDC_PINS 24 /* 24-bit display */ #define GPIO_LTDC_R0 GPIO_LTDC_R0_3 #define GPIO_LTDC_R1 GPIO_LTDC_R1_3 #define GPIO_LTDC_R2 GPIO_LTDC_R2_4 #define GPIO_LTDC_R3 GPIO_LTDC_R3_3 #define GPIO_LTDC_R4 GPIO_LTDC_R4_4 #define GPIO_LTDC_R5 GPIO_LTDC_R5_4 #define GPIO_LTDC_R6 GPIO_LTDC_R6_4 #define GPIO_LTDC_R7 GPIO_LTDC_R7_3 #define GPIO_LTDC_G0 GPIO_LTDC_G0_2 #define GPIO_LTDC_G1 GPIO_LTDC_G1_2 #define GPIO_LTDC_G2 GPIO_LTDC_G2_3 #define GPIO_LTDC_G3 GPIO_LTDC_G3_4 #define GPIO_LTDC_G4 GPIO_LTDC_G4_3 #define GPIO_LTDC_G5 GPIO_LTDC_G5_3 #define GPIO_LTDC_G6 GPIO_LTDC_G6_3 #define GPIO_LTDC_G7 GPIO_LTDC_G7_3 #define GPIO_LTDC_B0 GPIO_LTDC_B0_1 #define GPIO_LTDC_B1 GPIO_LTDC_B1_2 #define GPIO_LTDC_B2 GPIO_LTDC_B2_3 #define GPIO_LTDC_B3 GPIO_LTDC_B3_3 #define GPIO_LTDC_B4 GPIO_LTDC_B4_4 #define GPIO_LTDC_B5 GPIO_LTDC_B5_3 #define GPIO_LTDC_B6 GPIO_LTDC_B6_3 #define GPIO_LTDC_B7 GPIO_LTDC_B7_3 #define GPIO_LTDC_VSYNC GPIO_LTDC_VSYNC_2 #define GPIO_LTDC_HSYNC GPIO_LTDC_HSYNC_2 #define GPIO_LTDC_DE GPIO_LTDC_DE_3 #define GPIO_LTDC_CLK GPIO_LTDC_CLK_3 /* QSPI pinset */ #define GPIO_QSPI_CS GPIO_QUADSPI_BK1_NCS #define GPIO_QSPI_IO0 GPIO_QUADSPI_BK1_IO0_3 #define GPIO_QSPI_IO1 GPIO_QUADSPI_BK1_IO1_3 #define GPIO_QSPI_IO2 GPIO_QUADSPI_BK1_IO2_1 #define GPIO_QSPI_IO3 GPIO_QUADSPI_BK1_IO3_2 #define GPIO_QSPI_SCK GPIO_QUADSPI_CLK /* SDMMC */ /* Stream selections are arbitrary for now but might become important in the future * if we set aside more DMA channels/streams. * * SDIO DMA * DMAMAP_SDMMC1_1 = Channel 4, Stream 3 * DMAMAP_SDMMC1_2 = Channel 4, Stream 6 */ #define DMAMAP_SDMMC1 DMAMAP_SDMMC1_1 /* SDIO dividers. Note that slower clocking is required when DMA is disabled * in order to avoid RX overrun/TX underrun errors due to delayed responses * to service FIFOs in interrupt driven mode. These values have not been * tuned!!! * * SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(118+2)=400 KHz */ #define STM32_SDMMC_INIT_CLKDIV (118 << STM32_SDMMC_CLKCR_CLKDIV_SHIFT) /* DMA ON: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(1+2)=16 MHz * DMA OFF: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(2+2)=12 MHz */ #ifdef CONFIG_SDIO_DMA # define STM32_SDMMC_MMCXFR_CLKDIV (1 << STM32_SDMMC_CLKCR_CLKDIV_SHIFT) #else # define STM32_SDMMC_MMCXFR_CLKDIV (2 << STM32_SDMMC_CLKCR_CLKDIV_SHIFT) #endif /* DMA ON: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(1+2)=16 MHz * DMA OFF: SDIOCLK=48MHz, SDIO_CK=SDIOCLK/(2+2)=12 MHz */ #ifdef CONFIG_SDIO_DMA # define STM32_SDMMC_SDXFR_CLKDIV (1 << STM32_SDMMC_CLKCR_CLKDIV_SHIFT) #else # define STM32_SDMMC_SDXFR_CLKDIV (2 << STM32_SDMMC_CLKCR_CLKDIV_SHIFT) #endif #endif /* __BOARDS_ARM_STM32F7_STM32F746G_DISCO_INCLUDE_BOARD_H */