ST / Mbed OS DISCO_L496AG-SRAM-demo

SRAM demo using ST BSP driver.

Dependencies:   BSP_DISCO_L496AG

main.cpp@3:727e0290bde8, 2019-11-22 (annotated)

Committer:
Jerome Coutant
Date:
Fri Nov 22 16:06:21 2019 +0100
Revision:
3:727e0290bde8
Parent:
2:3fbe5f24c51d 
Update with CubeL4 V1.14.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bcostm 1:292265849500 1 #include "mbed.h"
bcostm 1:292265849500 2 #include "stm32l496g_discovery.h"
bcostm 1:292265849500 3 #include "stm32l496g_discovery_lcd.h"
bcostm 1:292265849500 4 #include "stm32l496g_discovery_sram.h"
bcostm 2:3fbe5f24c51d 5
bcostm 1:292265849500 6 #define BUFFER_SIZE ((uint32_t)0x1000)
bcostm 1:292265849500 7 #define SRAM_WRITE_READ_ADDR ((uint32_t)0x0800)
bcostm 2:3fbe5f24c51d 8
bcostm 1:292265849500 9 uint16_t sram_aTxBuffer[BUFFER_SIZE];
bcostm 1:292265849500 10 uint16_t sram_aRxBuffer[BUFFER_SIZE];
bcostm 1:292265849500 11
bcostm 1:292265849500 12 __IO uint8_t write_complete = 0;
bcostm 2:3fbe5f24c51d 13
bcostm 1:292265849500 14 static void print_demo_title(void);
bcostm 1:292265849500 15 static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset);
bcostm 1:292265849500 16 static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
bcostm 2:3fbe5f24c51d 17
bcostm 1:292265849500 18 int main()
bcostm 1:292265849500 19 {
bcostm 2:3fbe5f24c51d 20 print_demo_title();
bcostm 2:3fbe5f24c51d 21
Jerome Coutant 3:727e0290bde8 22 ThisThread::sleep_for(500);
bcostm 1:292265849500 23
bcostm 2:3fbe5f24c51d 24 /*##-1- Configure the SRAM device ##########################################*/
bcostm 2:3fbe5f24c51d 25 if (BSP_SRAM_Init() == SRAM_OK) {
bcostm 2:3fbe5f24c51d 26 BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"SRAM INIT OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 27 } else {
bcostm 2:3fbe5f24c51d 28 BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"SRAM INIT FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 29 }
bcostm 2:3fbe5f24c51d 30
Jerome Coutant 3:727e0290bde8 31 ThisThread::sleep_for(500);
bcostm 2:3fbe5f24c51d 32
bcostm 2:3fbe5f24c51d 33 /*##-2- SRAM memory read/write access ######################################*/
bcostm 2:3fbe5f24c51d 34
bcostm 2:3fbe5f24c51d 35 /* Fill the buffer to write */
bcostm 2:3fbe5f24c51d 36 Fill_Buffer(sram_aTxBuffer, BUFFER_SIZE, 0xC000);
bcostm 2:3fbe5f24c51d 37 /* Empty the buffer to read */
bcostm 2:3fbe5f24c51d 38 Fill_Buffer(sram_aRxBuffer, BUFFER_SIZE, 0);
bcostm 1:292265849500 39
bcostm 2:3fbe5f24c51d 40 /* Write data to the SRAM memory */
bcostm 2:3fbe5f24c51d 41 if (BSP_SRAM_WriteData(SRAM_DEVICE_ADDR + SRAM_WRITE_READ_ADDR, sram_aTxBuffer, BUFFER_SIZE) == SRAM_OK) {
bcostm 2:3fbe5f24c51d 42 BSP_LCD_DisplayStringAt(0, LINE(6), (uint8_t *)"SRAM WRITE OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 43 } else {
bcostm 2:3fbe5f24c51d 44 BSP_LCD_DisplayStringAt(0, LINE(6), (uint8_t *)"SRAM WRITE FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 45 }
bcostm 2:3fbe5f24c51d 46
Jerome Coutant 3:727e0290bde8 47 ThisThread::sleep_for(500);
bcostm 2:3fbe5f24c51d 48
bcostm 2:3fbe5f24c51d 49 /* Read back data from the SRAM memory */
bcostm 2:3fbe5f24c51d 50 if (BSP_SRAM_ReadData(SRAM_DEVICE_ADDR + SRAM_WRITE_READ_ADDR, sram_aRxBuffer, BUFFER_SIZE) == SRAM_OK) {
bcostm 2:3fbe5f24c51d 51 BSP_LCD_DisplayStringAt(0, LINE(7), (uint8_t *)"SRAM READ OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 52 } else {
bcostm 2:3fbe5f24c51d 53 BSP_LCD_DisplayStringAt(0, LINE(7), (uint8_t *)"SRAM READ FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 54 }
bcostm 2:3fbe5f24c51d 55
Jerome Coutant 3:727e0290bde8 56 ThisThread::sleep_for(1000);
bcostm 2:3fbe5f24c51d 57
bcostm 2:3fbe5f24c51d 58 /* Check read data */
bcostm 2:3fbe5f24c51d 59 if (Buffercmp(sram_aRxBuffer, sram_aTxBuffer, BUFFER_SIZE) == 0) {
bcostm 2:3fbe5f24c51d 60 BSP_LCD_DisplayStringAt(0, LINE(8), (uint8_t *)"SRAM COMPARE OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 61 } else {
bcostm 2:3fbe5f24c51d 62 BSP_LCD_DisplayStringAt(0, LINE(8), (uint8_t *)"SRAM COMPARE FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 63 }
bcostm 1:292265849500 64 }
bcostm 2:3fbe5f24c51d 65
bcostm 1:292265849500 66 static void print_demo_title(void)
bcostm 1:292265849500 67 {
bcostm 2:3fbe5f24c51d 68 BSP_LCD_Init();
bcostm 2:3fbe5f24c51d 69 BSP_LCD_Clear(LCD_COLOR_WHITE);
bcostm 2:3fbe5f24c51d 70
bcostm 2:3fbe5f24c51d 71 BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
bcostm 2:3fbe5f24c51d 72 BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
bcostm 2:3fbe5f24c51d 73
bcostm 2:3fbe5f24c51d 74 BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
bcostm 2:3fbe5f24c51d 75 BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
bcostm 2:3fbe5f24c51d 76 BSP_LCD_SetFont(&Font24);
bcostm 2:3fbe5f24c51d 77 BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SRAM", CENTER_MODE);
bcostm 2:3fbe5f24c51d 78 BSP_LCD_SetFont(&Font12);
bcostm 2:3fbe5f24c51d 79 BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"This example shows how to write", CENTER_MODE);
bcostm 2:3fbe5f24c51d 80 BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"and read data on the SRAM", CENTER_MODE);
bcostm 2:3fbe5f24c51d 81 BSP_LCD_SetFont(&Font20);
bcostm 1:292265849500 82 }
bcostm 1:292265849500 83
bcostm 2:3fbe5f24c51d 84
bcostm 1:292265849500 85 /**
bcostm 1:292265849500 86 * @brief Fills buffer with user predefined data.
bcostm 1:292265849500 87 * @param pBuffer: pointer on the buffer to fill
bcostm 1:292265849500 88 * @param uwBufferLength: size of the buffer to fill
bcostm 1:292265849500 89 * @param uwOffset: first value to fill on the buffer
bcostm 1:292265849500 90 * @retval None
bcostm 1:292265849500 91 */
bcostm 1:292265849500 92 static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset)
bcostm 1:292265849500 93 {
bcostm 2:3fbe5f24c51d 94 uint32_t tmpindex = 0;
bcostm 2:3fbe5f24c51d 95
bcostm 2:3fbe5f24c51d 96 /* Put in global buffer different values */
bcostm 2:3fbe5f24c51d 97 for (tmpindex = 0; tmpindex < uwBufferLength; tmpindex++ ) {
bcostm 2:3fbe5f24c51d 98 pBuffer[tmpindex] = tmpindex + uwOffset;
bcostm 2:3fbe5f24c51d 99 }
bcostm 1:292265849500 100 }
bcostm 2:3fbe5f24c51d 101
bcostm 1:292265849500 102 /**
bcostm 1:292265849500 103 * @brief Compares two buffers.
bcostm 1:292265849500 104 * @param pBuffer1, pBuffer2: buffers to be compared.
bcostm 1:292265849500 105 * @param BufferLength: buffer's length
bcostm 1:292265849500 106 * @retval 0: pBuffer identical to pBuffer1
bcostm 1:292265849500 107 * 1: pBuffer differs from pBuffer1
bcostm 1:292265849500 108 */
bcostm 1:292265849500 109 static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
bcostm 1:292265849500 110 {
bcostm 2:3fbe5f24c51d 111 while (BufferLength--) {
bcostm 2:3fbe5f24c51d 112 if (*pBuffer1 != *pBuffer2) {
bcostm 2:3fbe5f24c51d 113 return 1;
bcostm 2:3fbe5f24c51d 114 }
bcostm 2:3fbe5f24c51d 115
bcostm 2:3fbe5f24c51d 116 pBuffer1++;
bcostm 2:3fbe5f24c51d 117 pBuffer2++;
bcostm 1:292265849500 118 }
bcostm 2:3fbe5f24c51d 119
bcostm 2:3fbe5f24c51d 120 return 0;
bcostm 1:292265849500 121 }