ST / Mbed OS DISCO_L496AG-SRAM-demo

SRAM demo using ST BSP driver.

Dependencies:   BSP_DISCO_L496AG

main.cpp@2:3fbe5f24c51d, 2018-04-18 (annotated)

Committer:
bcostm
Date:
Wed Apr 18 08:50:07 2018 +0000
Revision:
2:3fbe5f24c51d
Parent:
1:292265849500
Child:
3:727e0290bde8
astyle

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 print_PASS(void);
bcostm 1:292265849500 16 static void print_FAIL(void);
bcostm 1:292265849500 17 static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset);
bcostm 1:292265849500 18 static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
bcostm 2:3fbe5f24c51d 19
bcostm 1:292265849500 20 int main()
bcostm 1:292265849500 21 {
bcostm 2:3fbe5f24c51d 22 print_demo_title();
bcostm 2:3fbe5f24c51d 23
bcostm 2:3fbe5f24c51d 24 wait(0.2);
bcostm 1:292265849500 25
bcostm 2:3fbe5f24c51d 26 /*##-1- Configure the SRAM device ##########################################*/
bcostm 2:3fbe5f24c51d 27 if (BSP_SRAM_Init() == SRAM_OK) {
bcostm 2:3fbe5f24c51d 28 BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"SRAM INIT OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 29 } else {
bcostm 2:3fbe5f24c51d 30 BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"SRAM INIT FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 31 print_FAIL();
bcostm 2:3fbe5f24c51d 32 }
bcostm 2:3fbe5f24c51d 33
bcostm 2:3fbe5f24c51d 34 wait(0.2);
bcostm 2:3fbe5f24c51d 35
bcostm 2:3fbe5f24c51d 36 /*##-2- SRAM memory read/write access ######################################*/
bcostm 2:3fbe5f24c51d 37
bcostm 2:3fbe5f24c51d 38 /* Fill the buffer to write */
bcostm 2:3fbe5f24c51d 39 Fill_Buffer(sram_aTxBuffer, BUFFER_SIZE, 0xC000);
bcostm 2:3fbe5f24c51d 40 /* Empty the buffer to read */
bcostm 2:3fbe5f24c51d 41 Fill_Buffer(sram_aRxBuffer, BUFFER_SIZE, 0);
bcostm 1:292265849500 42
bcostm 2:3fbe5f24c51d 43 /* Write data to the SRAM memory */
bcostm 2:3fbe5f24c51d 44 if (BSP_SRAM_WriteData(SRAM_DEVICE_ADDR + SRAM_WRITE_READ_ADDR, sram_aTxBuffer, BUFFER_SIZE) == SRAM_OK) {
bcostm 2:3fbe5f24c51d 45 BSP_LCD_DisplayStringAt(0, LINE(6), (uint8_t *)"SRAM WRITE OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 46 } else {
bcostm 2:3fbe5f24c51d 47 BSP_LCD_DisplayStringAt(0, LINE(6), (uint8_t *)"SRAM WRITE FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 48 print_FAIL();
bcostm 2:3fbe5f24c51d 49 }
bcostm 2:3fbe5f24c51d 50
bcostm 2:3fbe5f24c51d 51 wait(0.2);
bcostm 2:3fbe5f24c51d 52
bcostm 2:3fbe5f24c51d 53 /* Read back data from the SRAM memory */
bcostm 2:3fbe5f24c51d 54 if (BSP_SRAM_ReadData(SRAM_DEVICE_ADDR + SRAM_WRITE_READ_ADDR, sram_aRxBuffer, BUFFER_SIZE) == SRAM_OK) {
bcostm 2:3fbe5f24c51d 55 BSP_LCD_DisplayStringAt(0, LINE(7), (uint8_t *)"SRAM READ OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 56 } else {
bcostm 2:3fbe5f24c51d 57 BSP_LCD_DisplayStringAt(0, LINE(7), (uint8_t *)"SRAM READ FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 58 print_FAIL();
bcostm 2:3fbe5f24c51d 59 }
bcostm 2:3fbe5f24c51d 60
bcostm 2:3fbe5f24c51d 61 wait(0.2);
bcostm 2:3fbe5f24c51d 62
bcostm 2:3fbe5f24c51d 63 /* Check read data */
bcostm 2:3fbe5f24c51d 64 if (Buffercmp(sram_aRxBuffer, sram_aTxBuffer, BUFFER_SIZE) == 0) {
bcostm 2:3fbe5f24c51d 65 BSP_LCD_DisplayStringAt(0, LINE(8), (uint8_t *)"SRAM COMPARE OK", LEFT_MODE);
bcostm 2:3fbe5f24c51d 66 } else {
bcostm 2:3fbe5f24c51d 67 BSP_LCD_DisplayStringAt(0, LINE(8), (uint8_t *)"SRAM COMPARE FAIL", LEFT_MODE);
bcostm 2:3fbe5f24c51d 68 print_FAIL();
bcostm 2:3fbe5f24c51d 69 }
bcostm 2:3fbe5f24c51d 70
bcostm 2:3fbe5f24c51d 71 wait(0.2);
bcostm 2:3fbe5f24c51d 72 print_PASS();
bcostm 1:292265849500 73 }
bcostm 2:3fbe5f24c51d 74
bcostm 1:292265849500 75 static void print_demo_title(void)
bcostm 1:292265849500 76 {
bcostm 2:3fbe5f24c51d 77 BSP_LCD_Init();
bcostm 2:3fbe5f24c51d 78 BSP_LCD_Clear(LCD_COLOR_WHITE);
bcostm 2:3fbe5f24c51d 79
bcostm 2:3fbe5f24c51d 80 BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
bcostm 2:3fbe5f24c51d 81 BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
bcostm 2:3fbe5f24c51d 82
bcostm 2:3fbe5f24c51d 83 BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
bcostm 2:3fbe5f24c51d 84 BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
bcostm 2:3fbe5f24c51d 85 BSP_LCD_SetFont(&Font24);
bcostm 2:3fbe5f24c51d 86 BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SRAM", CENTER_MODE);
bcostm 2:3fbe5f24c51d 87 BSP_LCD_SetFont(&Font12);
bcostm 2:3fbe5f24c51d 88 BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"This example shows how to write", CENTER_MODE);
bcostm 2:3fbe5f24c51d 89 BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"and read data on the SRAM", CENTER_MODE);
bcostm 2:3fbe5f24c51d 90 BSP_LCD_SetFont(&Font20);
bcostm 1:292265849500 91 }
bcostm 1:292265849500 92
bcostm 1:292265849500 93 static void print_PASS(void)
bcostm 1:292265849500 94 {
bcostm 1:292265849500 95 BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
bcostm 1:292265849500 96 BSP_LCD_SetBackColor(LCD_COLOR_GREEN);
bcostm 1:292265849500 97 BSP_LCD_DisplayStringAt(0, LINE(10), (uint8_t *)"Demo OK", CENTER_MODE);
bcostm 1:292265849500 98 while(1);
bcostm 1:292265849500 99 }
bcostm 1:292265849500 100
bcostm 1:292265849500 101 static void print_FAIL(void)
bcostm 1:292265849500 102 {
bcostm 1:292265849500 103 BSP_LCD_SetBackColor(LCD_COLOR_RED);
bcostm 1:292265849500 104 BSP_LCD_DisplayStringAt(0, LINE(10), (uint8_t *)"Demo FAILED", CENTER_MODE);
bcostm 1:292265849500 105 while(1);
bcostm 1:292265849500 106 }
bcostm 2:3fbe5f24c51d 107
bcostm 1:292265849500 108 /**
bcostm 1:292265849500 109 * @brief Fills buffer with user predefined data.
bcostm 1:292265849500 110 * @param pBuffer: pointer on the buffer to fill
bcostm 1:292265849500 111 * @param uwBufferLength: size of the buffer to fill
bcostm 1:292265849500 112 * @param uwOffset: first value to fill on the buffer
bcostm 1:292265849500 113 * @retval None
bcostm 1:292265849500 114 */
bcostm 1:292265849500 115 static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset)
bcostm 1:292265849500 116 {
bcostm 2:3fbe5f24c51d 117 uint32_t tmpindex = 0;
bcostm 2:3fbe5f24c51d 118
bcostm 2:3fbe5f24c51d 119 /* Put in global buffer different values */
bcostm 2:3fbe5f24c51d 120 for (tmpindex = 0; tmpindex < uwBufferLength; tmpindex++ ) {
bcostm 2:3fbe5f24c51d 121 pBuffer[tmpindex] = tmpindex + uwOffset;
bcostm 2:3fbe5f24c51d 122 }
bcostm 1:292265849500 123 }
bcostm 2:3fbe5f24c51d 124
bcostm 1:292265849500 125 /**
bcostm 1:292265849500 126 * @brief Compares two buffers.
bcostm 1:292265849500 127 * @param pBuffer1, pBuffer2: buffers to be compared.
bcostm 1:292265849500 128 * @param BufferLength: buffer's length
bcostm 1:292265849500 129 * @retval 0: pBuffer identical to pBuffer1
bcostm 1:292265849500 130 * 1: pBuffer differs from pBuffer1
bcostm 1:292265849500 131 */
bcostm 1:292265849500 132 static uint8_t Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
bcostm 1:292265849500 133 {
bcostm 2:3fbe5f24c51d 134 while (BufferLength--) {
bcostm 2:3fbe5f24c51d 135 if (*pBuffer1 != *pBuffer2) {
bcostm 2:3fbe5f24c51d 136 return 1;
bcostm 2:3fbe5f24c51d 137 }
bcostm 2:3fbe5f24c51d 138
bcostm 2:3fbe5f24c51d 139 pBuffer1++;
bcostm 2:3fbe5f24c51d 140 pBuffer2++;
bcostm 1:292265849500 141 }
bcostm 2:3fbe5f24c51d 142
bcostm 2:3fbe5f24c51d 143 return 0;
bcostm 1:292265849500 144 }