stm32lib - where do I get it from

[Giovanni]

I don't know, just try. If it compiles most likely it will work.

Giovanni

[yushanh]

Thanks Giovanni,

I tried to use the system call but there seemed to be some conflict in GPIO_TypeDef.

Currently I'm trying to control the LCD board on top of stm32l-discovery. To avoid the compile error I encountered, I decided to use the GPIO_TypeDef under pal_lld.h, and change the code in LCD I/O configuration. My code structure is basically the same as the pure ST library code I used before, but somehow the LCD didn't display the string. (But the LED4 still turns on, which means PAL should be working fine) I wonder if there's any internal setup I overlook in ChibiOS?

The PAL driver has been enabled in halconf.h.

Code: Select all

int main(void) {
  halInit();
  chSysInit();
  palSetPadMode(GPIOA, 1|2|3|8|9|10|15, PAL_MODE_ALTERNATE(11));
  palSetPadMode(GPIOB, 3|4|5|8|9|10|11|12|13|14|15, PAL_MODE_ALTERNATE(11));
  palSetPadMode(GPIOC, 0|1|2|3|6|7|8|9|10|11, PAL_MODE_ALTERNATE(11));
  palSetPadMode(GPIOB, 6, PAL_MODE_OUTPUT_PUSHPULL);

  RCC_Config();                             /* not sure where to configure clock for the LCD, so I do it here... */
  LCD_GLASS_Init();                        /* from the library stm32l_discovery_lcd.c */

  while(TRUE) {
    palSetPad(GPIOB, GPIOB_LED4);              /*LED blinks*/
    chThdSleepMilliseconds(500);
    palClearPad(GPIOB, GPIOB_LED4);              
    chThdSleepMilliseconds(500);

    LCD_GLASS_DisplayString("123456");
  }

}

void RCC_Config(void)
{
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_LCD, ENABLE);

  /* Allow access to the RTC */
  PWR_RTCAccessCmd(ENABLE);

  /* Reset Backup Domain */
  RCC_RTCResetCmd(ENABLE);
  RCC_RTCResetCmd(DISABLE);

  /*!< LSE Enable */
  RCC_LSEConfig(RCC_LSE_ON);

  /*!< Wait till LSE is ready */
  while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
  {}
  /*!< LCD Clock Source Selection */
  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
}

[Giovanni]

You are using setPadMode() in a wrong way, you can specify only a single pad there. See palSetPortMode() instead.

BTW "1|2|3|8|9|10|15" = 15, you cannot OR numbers like that.

Giovanni

[yushanh]

Ah ha, i see... The OR thing really messed up my I/O config.
It works fine now. Thanks you so much!


S.