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main.cpp
- Committer:
- Yanagihara
- Date:
- 2021-09-29
- Revision:
- 1:534cb807eeff
- Parent:
- 0:29e55001d8e4
- Child:
- 2:dd1c560b4906
File content as of revision 1:534cb807eeff:
#include "mbed.h"
SPI spi(p5,p6,p7); //mosi,miso,sclk
DigitalOut cs(p8);
Serial pc(USBTX,USBRX);
Timer t;
/*Flashのコマンドを発行*/
#define CMD_RDID 0x9f //
#define CMD_READ 0x03 // Address Read Data
#define CMD_WREN 0x06 // Write Enable
#define CMD_SE 0x20 // Sector Erase
#define CMD_PP 0x02 // Page Programming
#define CMD_RDSR1 0x05 // Read Status Resistor (WIP check)
void spi_init(){ /*spi通信設定*/
spi.format(8,0);
spi.frequency(1000000); // 1,000,000=1MHz clock rate
cs = 1; //初期化
}
void spi_transfer(const uint8_t* tx_buf, uint8_t* rx_buf, uint16_t length) { // 送受信両方判断し通信実行する関数
pc.printf("#spi_transfer length= 0x%X\r\n",length);
for(uint16_t i = 0 ; i<length ; i++){
uint8_t data = spi.write(tx_buf != NULL ? tx_buf[i] : 0x0); // txDataが有るならtxDataを送る,無いなら0を送る
if(rx_buf != NULL){ // もし受信データを表示したい場合
rx_buf[i] = data;
}
}
}
void spi_read_data(uint8_t* rx_buf, uint16_t length){ /*受信*/
spi_transfer(NULL, rx_buf, length);
}
void spi_write_data(const uint8_t* tx_buf, uint16_t length){ /*受信*/
spi_transfer(tx_buf, NULL, length);
}
/*Flash関数*/
void flash_send_addr(uint32_t addr) {
const uint8_t data[] = {
(addr >> 16) & 0xff, // 1のところだけ残す
(addr >> 8) & 0xff,
(addr >> 0) & 0xff,
};
for(int i=0; i<3; i++){ // addr : 3byte
spi.write(data[i]);
}
}
void flash_rdid(uint8_t* rx_buf, uint16_t length){ /*RDID読み出し*/
cs = 0;
spi.write(CMD_RDID);
spi_read_data(rx_buf, length);
cs = 1;
}
void flash_read(uint32_t addr, uint8_t* rx_buf, uint16_t length) { /*読み出し*/
cs = 0;
spi.write(CMD_READ);
flash_send_addr(addr);
spi_read_data(rx_buf, length);
cs = 1;
}
void flash_wren(){ // write enable
cs = 0;
spi.write(CMD_WREN);
cs = 1;
}
void flash_se(uint32_t addr) { // sector erase
cs = 0;
spi.write(CMD_SE);
flash_send_addr(addr);
cs = 1;
}
void flash_pp(uint32_t addr, const uint8_t* wr_data, uint16_t length) { // Page Program
cs = 0;
spi.write(CMD_PP);
flash_send_addr(addr);
spi_write_data(wr_data, length);
cs = 1;
}
void flash_rdsr(uint8_t* rx_buf, uint16_t length) {
cs = 0;
spi.write(CMD_RDSR1);
spi_read_data(rx_buf, length); // rx_bufにRDSRの値が入っている
cs = 1;
}
uint8_t flash_is_wip() { // (WIP)Write In Progress(書込み中)かどうか確認
uint8_t data; //❓
flash_rdsr(&data, 0x01); // 1byte(StatusRegister情報)
return(data & 0x01); //WIP // ビット演算_&
}
void data_debug_print(const uint8_t* data, uint16_t bytes){ //配列を表示
pc.printf("+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F\r\n");
pc.printf("-----------------------------------------------\r\n");
uint16_t depth = ((bytes - 1) >> 4) + 1;
for(uint16_t j = 0 ; j < depth ; ++j){ //depthは何行❓
for(uint16_t i = 0 ; i < 16 ; ++i){
uint8_t d = data[i + (j << 4)];
pc.printf("%X", (d >> 4) & 0x0f);
pc.printf("%X", (d >> 0) & 0x0f);
pc.printf(" ");
}
pc.printf("\r\n");
}
pc.printf("\r\n");
}
/******************** main *********************/
int main() {
uint8_t tx_buf[256];
uint8_t rx_buf[256]; // 受信バッファ用意
uint32_t addr = 0x0; // 3byte (or 4byte)
uint16_t length = 0x100;
spi_init(); // spi初期設定
pc.printf("-- verification of Flash memory --\r\n");
pc.printf("\r\n");
/*RDID Phase*/
pc.printf("<<RDID start>>\r\n");
flash_rdid(rx_buf, 3); // RDID読み出し関数
data_debug_print(rx_buf, 3); // 取得データ表示
pc.printf("<<Read start>>\r\n");
flash_read(addr, rx_buf, length); // 読み出し関数
data_debug_print(rx_buf, length); // 取得データ表示
/*Erase Phase*/
pc.printf("<<Erase start>>\r\n");
t.start(); // 消去時間計測
flash_wren(); // 書込み・消去の前に必ず必要
flash_se(addr);
pc.printf("*SPI For WIP\r\n");
while(flash_is_wip()){ // 消去待ち(WIPが 1 の間) // While文が1周回る毎にflash_is_wipを実行している?
}
t.stop();
pc.printf("\r\n");
pc.printf("Erase complete! \r\n");
printf("The Erase time taken was %f μs\r\n", t.read_us());
pc.printf("\r\n");
pc.printf("Erase check (Read the erased address.)\r\n");
flash_read(addr, rx_buf, length);
data_debug_print(rx_buf, length);
/*Write Phase*/
pc.printf("Make Sequential Data...\r\n\r\n");
for(uint16_t i = 0; i < length; ++i) {
tx_buf[i] = i & 0xff; // 配列に1~256(0xFF)まで入れる
}
pc.printf("<<Write start>>\r\n");
t.start(); // 書込時間計測
flash_wren(); // 書込み・消去の前に必ず必要
flash_pp(addr, tx_buf, length);
pc.printf("*SPI For WIP\r\n");
while(flash_is_wip()){ // 消去待ち(WIPが 1 の間) // While文が1周回る毎にflash_is_wipを実行している?
}
pc.printf("\r\n");
t.stop();
pc.printf("Write complete! \r\n");
printf("The Write time taken was %f μs\r\n", t.read_us());
pc.printf("\r\n");
pc.printf("Write Data check (Read the Written address.)\r\n");
flash_read(addr, rx_buf, length);
data_debug_print(rx_buf, length);
}