-/* this example is only for stm32l discover */
-
-typedef unsigned char uint8_t;
-typedef unsigned int uint32_t;
-
+/* this example is only for stm32l discover.
+ adapted from ST firmwares projects.
+ */
+
+/* base headers */
+#include "stdint.h"
+
+/* libstm32l_discovery headers */
+#include "stm32l1xx_gpio.h"
+#include "stm32l1xx_adc.h"
+#include "stm32l1xx_lcd.h"
+#include "stm32l1xx_rcc.h"
+#include "stm32l1xx_rtc.h"
+#include "stm32l1xx_exti.h"
+#include "stm32l1xx_pwr.h"
+#include "stm32l1xx_syscfg.h"
+#include "stm32l1xx_dbgmcu.h"
+
+/* lcd wrapper routines header */
+#include "stm32l_discovery_lcd.h"
/* boot mode */
refer to CD00240193.pdf, GPIO.
*/
-#define GPIOA 0x40020000
-#define GPIOA_MODER (GPIOA + 0x00)
-#define GPIOA_ODR (GPIOA + 0x14)
+#define GPIOA_MODER (GPIOA_BASE + 0x00)
+#define GPIOA_ODR (GPIOA_BASE + 0x14)
-#define GPIOB 0x40020400
-#define GPIOB_MODER (GPIOB + 0x00)
-#define GPIOB_ODR (GPIOB + 0x14)
+#define GPIOB_MODER (GPIOB_BASE + 0x00)
+#define GPIOB_ODR (GPIOB_BASE + 0x14)
-#define GPIOC 0x40020800
-#define GPIOC_MODER (GPIOC + 0x00)
-#define GPIOC_ODR (GPIOC + 0x14)
+#define GPIOC_MODER (GPIOC_BASE + 0x00)
+#define GPIOC_ODR (GPIOC_BASE + 0x14)
/* leds */
}
-/* lcd. refer to DM00027954.pdf. */
+#define delay() \
+do { \
+ register unsigned int i; \
+ for (i = 0; i < 1000000; ++i) \
+ __asm__ __volatile__ ("nop\n\t":::"memory"); \
+} while (0)
+
+
+#if CONFIG_BOOT_SRAM
+
+extern uint32_t _fstack;
+
+static inline void setup_stack(void)
+{
+ /* setup the stack to point to _fstack (refer to ld script) */
+
+ static const uint32_t fstack = (uint32_t)&_fstack;
+
+ __asm__ __volatile__
+ (
+ "ldr sp, %0\n\t"
+ :
+ : "m"(fstack)
+ : "sp"
+ );
+}
+
+#endif /* CONFIG_BOOT_SRAM */
+
+
+/* application related setup */
+
+static void RCC_Configuration(void)
+{
+ /* Enable HSI Clock */
+ RCC_HSICmd(ENABLE);
+
+ /*!< Wait till HSI is ready */
+ while (RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
+
+ /* Set HSI as sys clock*/
+ RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
+
+ /* Set MSI clock range to ~4.194MHz*/
+ RCC_MSIRangeConfig(RCC_MSIRange_6);
+
+ /* Enable the GPIOs clocks */
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC| RCC_AHBPeriph_GPIOD| RCC_AHBPeriph_GPIOE| RCC_AHBPeriph_GPIOH, ENABLE);
+
+ /* Enable comparator, LCD and PWR mngt clocks */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_COMP | RCC_APB1Periph_LCD | RCC_APB1Periph_PWR,ENABLE);
+
+ /* Enable ADC & SYSCFG clocks */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_SYSCFG , ENABLE);
+
+ /* Allow access to the RTC */
+ PWR_RTCAccessCmd(ENABLE);
+
+ /* Reset RTC Backup Domain */
+ RCC_RTCResetCmd(ENABLE);
+ RCC_RTCResetCmd(DISABLE);
+
+ /* LSE Enable */
+ RCC_LSEConfig(RCC_LSE_ON);
+
+ /* Wait until LSE is ready */
+ while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);
+
+ /* RTC Clock Source Selection */
+ RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
+
+ /* Enable the RTC */
+ RCC_RTCCLKCmd(ENABLE);
+
+ /*Disable HSE*/
+ RCC_HSEConfig(RCC_HSE_OFF);
+ if(RCC_GetFlagStatus(RCC_FLAG_HSERDY) != RESET )
+ {
+ /* Stay in infinite loop if HSE is not disabled*/
+ while(1);
+ }
+}
+
+static void Init_GPIOs(void)
+{
+#if 0 /* fixme: GPIO_Init raises a bug in some gcc toolchains */
+
+ /* GPIO, EXTI and NVIC Init structure declaration */
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+#if 0
+ EXTI_InitTypeDef EXTI_InitStructure;
+ NVIC_InitTypeDef NVIC_InitStructure;
+#endif
#if 0
+ /* Configure User Button pin as input */
+ GPIO_InitStructure.GPIO_Pin = USERBUTTON_GPIO_PIN;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
+ GPIO_Init(USERBUTTON_GPIO_PORT, &GPIO_InitStructure);
+#endif
-#define LCD_SEG0 PA1
-#define LCD_SEG1 PA2
-#define LCD_SEG2 PA3
-#define LCD_SEG3 PB3
-#define LCD_SEG4 PB4
-#define LCD_SEG5 PB5
-#define LCD_SEG6 PB10
-#define LCD_SEG7 PB11
-#define LCD_SEG8 PB12
-#define LCD_SEG9 PB13
-#define LCD_SEG10 PB14
-#define LCD_SEG11 PB15
-#define LCD_SEG12 PA15
-#define LCD_SEG13 PB8
-#define LCD_SEG14 PC0
-#define LCD_SEG15 PC1
-#define LCD_SEG16 PC2
-#define LCD_SEG17 PC3
-#define LCD_SEG18 PC6
-#define LCD_SEG19 PC7
-#define LCD_SEG20 PC8
-#define LCD_SEG21 PC9
-#define LCD_SEG22 PC10
-#define LCD_SEG23 PC11
-#define LCD_COM0 PA8
-#define LCD_COM1 PA9
-#define LCD_COM2 PA10
-#define LCD_COM3 PB9
+#if 0
+ /* Select User Button pin as input source for EXTI Line */
+ SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA,EXTI_PinSource0);
+
+ /* Configure EXT1 Line 0 in interrupt mode trigged on Rising edge */
+ EXTI_InitStructure.EXTI_Line = EXTI_Line0 ; // PA0 for User button AND IDD_WakeUP
+ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
+ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
+ EXTI_InitStructure.EXTI_LineCmd = ENABLE;
+ EXTI_Init(&EXTI_InitStructure);
+
+ /* Enable and set EXTI0 Interrupt to the lowest priority */
+ NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn ;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
+ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
+ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+ NVIC_Init(&NVIC_InitStructure);
+#endif
+#if 0
+ /* Configure the LED_pin as output push-pull for LD3 & LD4 usage*/
+ GPIO_InitStructure.GPIO_Pin = LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
+ GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
+ GPIO_Init(LD_GPIO_PORT, &GPIO_InitStructure);
+
+ /* Force a low level on LEDs*/
+ GPIO_LOW(LD_GPIO_PORT,LD_GREEN_GPIO_PIN);
+ GPIO_LOW(LD_GPIO_PORT,LD_BLUE_GPIO_PIN);
+
+ /* Counter enable: GPIO set in output for enable the counter */
+ GPIO_InitStructure.GPIO_Pin = CTN_CNTEN_GPIO_PIN;
+ GPIO_Init( CTN_GPIO_PORT, &GPIO_InitStructure);
+
+ /* To prepare to start counter */
+ GPIO_HIGH(CTN_GPIO_PORT,CTN_CNTEN_GPIO_PIN);
+
+ /* Configure Port A LCD Output pins as alternate function */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_8 | GPIO_Pin_9 |GPIO_Pin_10 |GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+ GPIO_Init( GPIOA, &GPIO_InitStructure);
+
+ /* Select LCD alternate function for Port A LCD Output pins */
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource1,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource2,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource3,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource8,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource9,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource10,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOA, GPIO_PinSource15,GPIO_AF_LCD) ;
+
+ /* Configure Port B LCD Output pins as alternate function */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_8 | GPIO_Pin_9 \
+ | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+ GPIO_Init( GPIOB, &GPIO_InitStructure);
+
+ /* Select LCD alternate function for Port B LCD Output pins */
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource3,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource4,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource5,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource8,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource9,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource10,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource11,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource12,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource13,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource14,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource15,GPIO_AF_LCD) ;
#endif
-static void setup_lcd(void)
-{
+#if 0
+ /* Configure Port C LCD Output pins as alternate function */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_6 \
+ | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |GPIO_Pin_11 ;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+ GPIO_Init( GPIOC, &GPIO_InitStructure);
+
+ /* Select LCD alternate function for Port B LCD Output pins */
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource0,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource1,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource2,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource3,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource6,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource7,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource8,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource9,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource10,GPIO_AF_LCD) ;
+ GPIO_PinAFConfig(GPIOC, GPIO_PinSource11,GPIO_AF_LCD) ;
+#endif
+
+#if 0
+ /* Configure ADC (IDD_MEASURE) pin as Analogue */
+ GPIO_InitStructure.GPIO_Pin = IDD_MEASURE ;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
+ GPIO_Init( IDD_MEASURE_PORT, &GPIO_InitStructure);
+#endif
+
+#else /* fixme */
+
/* set every port in digital output mode */
/* PA[1:3,8:10,15] */
(1 << (9 * 2)) |
(1 << (10 * 2)) |
(1 << (11 * 2));
-}
-
-static inline void set_lcd_com(unsigned int i, unsigned int val)
-{
- /* table for LCD_COM<N> */
- static const uint32_t regs[4] = { GPIOA_ODR, GPIOA_ODR, GPIOA_ODR, GPIOB_ODR };
- static const uint8_t bits[4] = { 8, 9, 10, 9 };
-
- uint32_t tmp = *(volatile uint32_t*)regs[i];
- tmp &= ~(1 << bits[i]);
- tmp |= val << bits[i];
- *(volatile uint32_t*)regs[i] = tmp;
-}
-
-static void clear_lcd(void)
-{
- /* tables for LCD_SEG<N> */
-
- static const uint32_t regs[24] =
- {
- GPIOA_ODR,
- GPIOA_ODR,
- GPIOA_ODR,
-
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
- GPIOB_ODR,
-
- GPIOA_ODR,
-
- GPIOB_ODR,
-
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR,
- GPIOC_ODR
- };
-
- static const uint8_t bits[24] =
- {
- 1,
- 2,
- 3,
-
- 3,
- 4,
- 5,
- 10,
- 11,
- 12,
- 13,
- 14,
- 15,
-
- 15,
-
- 8,
-
- 0,
- 1,
- 2,
- 3,
- 6,
- 7,
- 8,
- 9,
- 10,
- 11
- };
-
- /* foreach lcd selector, select and zero */
- unsigned int i;
- for (i = 0; i < sizeof(regs) / sizeof(regs[0]); ++i)
- {
- /* select */
- *(volatile uint32_t*)regs[i] |= 1 << bits[i];
-
- /* set segments */
- set_lcd_com(0, 0);
- set_lcd_com(1, 0);
- set_lcd_com(2, 0);
- set_lcd_com(3, 0);
- /* deselect */
- *(volatile uint32_t*)regs[i] &= ~(1 << bits[i]);
- }
+#endif /* fixme */
}
-static void update_lcd(void)
-{
- static unsigned int state = 0;
-
- clear_lcd();
-
-/* if (state == 0) */
- if (1)
- {
- /* left square (segments: 1A, 1B, 1C, 1D, 1E, 1F) */
-
- /* 1A, 1B: PC10, COM0, COM1 */
- *(volatile uint32_t*)GPIOC_ODR |= 1 << 10;
- set_lcd_com(0, 1);
- set_lcd_com(1, 1);
- set_lcd_com(2, 0);
- set_lcd_com(3, 0);
- *(volatile uint32_t*)GPIOC_ODR &= ~(1 << 10);
-
- /* 1C: PA2, COM1 */
- *(volatile uint32_t*)GPIOA_ODR |= 1 << 2;
- set_lcd_com(0, 0);
- set_lcd_com(1, 1);
- set_lcd_com(2, 0);
- set_lcd_com(3, 0);
- *(volatile uint32_t*)GPIOA_ODR &= ~(1 << 2);
-
- /* 1D, 1E: PA1, COM0, COM1 */
- *(volatile uint32_t*)GPIOA_ODR |= 1 << 1;
- set_lcd_com(0, 1);
- set_lcd_com(1, 1);
- set_lcd_com(2, 0);
- set_lcd_com(3, 0);
- *(volatile uint32_t*)GPIOA_ODR &= ~(1 << 1);
-
- /* 1F: PC11, COM1 */
- *(volatile uint32_t*)GPIOC_ODR |= 1 << 11;
- set_lcd_com(0, 0);
- set_lcd_com(1, 1);
- set_lcd_com(2, 0);
- set_lcd_com(3, 0);
- *(volatile uint32_t*)GPIOC_ODR &= ~(1 << 11);
- }
- else
- {
- /* right square (segments: 6A, 6B, 6C, 6D, 6E, 6F) */
- }
-
-/* state ^= 1; */
-}
-
-
-#define delay() \
-do { \
- register unsigned int i; \
- for (i = 0; i < 1000000; ++i) \
- __asm__ __volatile__ ("nop\n\t":::"memory"); \
-} while (0)
-
-
-#if CONFIG_BOOT_SRAM
-
-extern uint32_t _fstack;
-
-static inline void setup_stack(void)
-{
- /* setup the stack to point to _fstack (refer to ld script) */
-
- static const uint32_t fstack = (uint32_t)&_fstack;
-
- __asm__ __volatile__
- (
- "ldr sp, %0\n\t"
- :
- : "m"(fstack)
- : "sp"
- );
-}
-
-#endif /* CONFIG_BOOT_SRAM */
+/* main */
static void __attribute__((naked)) __attribute__((used)) main(void)
{
setup_stack();
#endif /* CONFIG_BOOT_SRAM */
- setup_leds();
+ RCC_Configuration();
- setup_lcd();
- clear_lcd();
-/* while (1) ; */
+ Init_GPIOs();
- update_lcd();
+ LCD_GLASS_Init();
+ LCD_BlinkConfig(LCD_BlinkMode_AllSEG_AllCOM,LCD_BlinkFrequency_Div512);
+ LCD_GLASS_DisplayString("FUBAR");
while (1) ;
+ setup_leds();
+
while (1)
{
- /* update_lcd(); */
- switch_leds_on();
+ /* switch_leds_on(); */
+ GPIO_HIGH(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
+ GPIO_HIGH(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
delay();
- /* update_lcd(); */
- switch_leds_off();
+ /* switch_leds_off(); */
+ GPIO_LOW(LD_GPIO_PORT, LD_GREEN_GPIO_PIN);
+ GPIO_LOW(LD_GPIO_PORT, LD_BLUE_GPIO_PIN);
delay();
+
+ LCD_GLASS_Clear();
+ LCD_GLASS_DisplayString("FUBAR");
}
}
projects / fw / stlink / blobdiff