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PWM driver works

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4205 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-12-20 17:31:06 +00:00
parent 6cf205e36e
commit e292c452c1
3 changed files with 39 additions and 17 deletions
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6
configs/stm3240g-eval/include/board.h
View File

@ -271,7 +271,11 @@
* *
* PD13 FSMC_A18 / MC_TIM4_CH2 pin 33 (EnB) * PD13 FSMC_A18 / MC_TIM4_CH2 pin 33 (EnB)
* *
* FSMC must be disabled in this case! * FSMC must be disabled in this case! PD13 is available at:
*
* Daughterboard Extension Connector, CN3, pin 32 - available
* TFT LCD Connector, CN19, pin 17 -- not available without removing the LCD.
* Motor Control Connector CN15, pin 33 -- no available unless to connect SB14.
*/ */
#define GPIO_TIM4_CH2 GPIO_TIM4_CH2_2 #define GPIO_TIM4_CH2 GPIO_TIM4_CH2_2

6
configs/stm3240g-eval/src/stm3240g-internal.h
View File

@ -92,7 +92,11 @@
* *
* PD13 FSMC_A18 / MC_TIM4_CH2 pin 33 (EnB) * PD13 FSMC_A18 / MC_TIM4_CH2 pin 33 (EnB)
* *
* FSMC must be disabled in this case! * FSMC must be disabled in this case! PD13 is available at:
*
* Daughterboard Extension Connector, CN3, pin 32 - available
* TFT LCD Connector, CN19, pin 17 -- not available without removing the LCD.
* Motor Control Connector CN15, pin 33 -- no available unless to connect SB14.
*/ */
#define STM3240G_EVAL_PWMTIMER 4 #define STM3240G_EVAL_PWMTIMER 4

18
configs/stm3240g-eval/src/up_pwm.c
View File

@ -40,6 +40,7 @@
#include <nuttx/config.h> #include <nuttx/config.h>
#include <errno.h>
#include <debug.h> #include <debug.h>
#include <nuttx/pwm.h> #include <nuttx/pwm.h>
@ -102,18 +103,23 @@
* *
************************************************************************************/ ************************************************************************************/
void pwm_devinit(void) int pwm_devinit(void)
{ {
static bool initialized = false;
struct pwm_lowerhalf_s *pwm; struct pwm_lowerhalf_s *pwm;
int ret; int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call stm32_pwminitialize() to get an instance of the PWM interface */ /* Call stm32_pwminitialize() to get an instance of the PWM interface */
pwm = stm32_pwminitialize(STM3240G_EVAL_PWMTIMER); pwm = stm32_pwminitialize(STM3240G_EVAL_PWMTIMER);
if (!pwm) if (!pwm)
{ {
dbg("Failed to get the STM32 PWM lower half\n"); dbg("Failed to get the STM32 PWM lower half\n");
return; return -ENODEV;
} }
/* Register the PWM driver at "/dev/pwm0" */ /* Register the PWM driver at "/dev/pwm0" */
@ -122,7 +128,15 @@ void pwm_devinit(void)
if (ret < 0) if (ret < 0)
{ {
adbg("pwm_register failed: %d\n", ret); adbg("pwm_register failed: %d\n", ret);
return ret;
} }
/* Now we are initialized */
initialized = true;
}
return OK;
} }
#endif /* HAVE_PWM */ #endif /* HAVE_PWM */