SRAM demo using ST BSP driver.
Dependencies: BSP_DISCO_L496AG
Diff: main.cpp
- Revision:
- 1:292265849500
- Child:
- 2:3fbe5f24c51d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Apr 18 10:47:19 2018 +0200 @@ -0,0 +1,153 @@ +#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; +} + + \ No newline at end of file