SRAM demo using ST BSP driver.
Dependencies: BSP_DISCO_L496AG
main.cpp
- Committer:
- bcostm
- Date:
- 2018-04-18
- Revision:
- 2:3fbe5f24c51d
- Parent:
- 1:292265849500
- Child:
- 3:727e0290bde8
File content as of revision 2:3fbe5f24c51d:
#include "mbed.h" #include "stm32l496g_discovery.h" #include "stm32l496g_discovery_lcd.h" #include "stm32l496g_discovery_sram.h" #define BUFFER_SIZE ((uint32_t)0x1000) #define SRAM_WRITE_READ_ADDR ((uint32_t)0x0800) uint16_t sram_aTxBuffer[BUFFER_SIZE]; uint16_t sram_aRxBuffer[BUFFER_SIZE]; __IO uint8_t write_complete = 0; static void print_demo_title(void); static void print_PASS(void); static void print_FAIL(void); static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset); static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength); int main() { print_demo_title(); wait(0.2); /*##-1- Configure the SRAM device ##########################################*/ if (BSP_SRAM_Init() == SRAM_OK) { BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"SRAM INIT OK", LEFT_MODE); } else { BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"SRAM INIT FAIL", LEFT_MODE); print_FAIL(); } wait(0.2); /*##-2- SRAM memory read/write access ######################################*/ /* Fill the buffer to write */ Fill_Buffer(sram_aTxBuffer, BUFFER_SIZE, 0xC000); /* Empty the buffer to read */ Fill_Buffer(sram_aRxBuffer, BUFFER_SIZE, 0); /* Write data to the SRAM memory */ if (BSP_SRAM_WriteData(SRAM_DEVICE_ADDR + SRAM_WRITE_READ_ADDR, sram_aTxBuffer, BUFFER_SIZE) == SRAM_OK) { BSP_LCD_DisplayStringAt(0, LINE(6), (uint8_t *)"SRAM WRITE OK", LEFT_MODE); } else { BSP_LCD_DisplayStringAt(0, LINE(6), (uint8_t *)"SRAM WRITE FAIL", LEFT_MODE); print_FAIL(); } wait(0.2); /* Read back data from the SRAM memory */ if (BSP_SRAM_ReadData(SRAM_DEVICE_ADDR + SRAM_WRITE_READ_ADDR, sram_aRxBuffer, BUFFER_SIZE) == SRAM_OK) { BSP_LCD_DisplayStringAt(0, LINE(7), (uint8_t *)"SRAM READ OK", LEFT_MODE); } else { BSP_LCD_DisplayStringAt(0, LINE(7), (uint8_t *)"SRAM READ FAIL", LEFT_MODE); print_FAIL(); } wait(0.2); /* Check read data */ if (Buffercmp(sram_aRxBuffer, sram_aTxBuffer, BUFFER_SIZE) == 0) { BSP_LCD_DisplayStringAt(0, LINE(8), (uint8_t *)"SRAM COMPARE OK", LEFT_MODE); } else { BSP_LCD_DisplayStringAt(0, LINE(8), (uint8_t *)"SRAM COMPARE FAIL", LEFT_MODE); print_FAIL(); } wait(0.2); print_PASS(); } static void print_demo_title(void) { BSP_LCD_Init(); BSP_LCD_Clear(LCD_COLOR_WHITE); BSP_LCD_SetTextColor(LCD_COLOR_BLUE); BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80); BSP_LCD_SetTextColor(LCD_COLOR_WHITE); BSP_LCD_SetBackColor(LCD_COLOR_BLUE); BSP_LCD_SetFont(&Font24); BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SRAM", CENTER_MODE); BSP_LCD_SetFont(&Font12); BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"This example shows how to write", CENTER_MODE); BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"and read data on the SRAM", CENTER_MODE); BSP_LCD_SetFont(&Font20); } static void print_PASS(void) { BSP_LCD_SetTextColor(LCD_COLOR_BLACK); BSP_LCD_SetBackColor(LCD_COLOR_GREEN); BSP_LCD_DisplayStringAt(0, LINE(10), (uint8_t *)"Demo OK", CENTER_MODE); while(1); } static void print_FAIL(void) { BSP_LCD_SetBackColor(LCD_COLOR_RED); BSP_LCD_DisplayStringAt(0, LINE(10), (uint8_t *)"Demo FAILED", CENTER_MODE); while(1); } /** * @brief Fills buffer with user predefined data. * @param pBuffer: pointer on the buffer to fill * @param uwBufferLength: size of the buffer to fill * @param uwOffset: first value to fill on the buffer * @retval None */ static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset) { uint32_t tmpindex = 0; /* Put in global buffer different values */ for (tmpindex = 0; tmpindex < uwBufferLength; tmpindex++ ) { pBuffer[tmpindex] = tmpindex + uwOffset; } } /** * @brief Compares two buffers. * @param pBuffer1, pBuffer2: buffers to be compared. * @param BufferLength: buffer's length * @retval 0: pBuffer identical to pBuffer1 * 1: pBuffer differs from pBuffer1 */ static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength) { while (BufferLength--) { if (*pBuffer1 != *pBuffer2) { return 1; } pBuffer1++; pBuffer2++; } return 0; }