mirror of https://github.com/ARMmbed/mbed-os.git
137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
#include "mbed.h"
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#include "test_env.h"
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#include <stdio.h>
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#define ADDR (0x90)
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#define FREQ 100000
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#define SIZE 10
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// ********************************************************
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// This tests data transfer between two I2C interfaces on
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// the same chip, one configured as master, the other as
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// slave.
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//
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// Wiring: cf below
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// ********************************************************
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#if defined (TARGET_NUCLEO_F411RE) || defined (TARGET_NUCLEO_F446RE) || defined (TARGET_NUCLEO_F410RB) || defined (TARGET_NUCLEO_F401RE)
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I2C master(PB_9, PB_8); // I2C_1 (Arduino: D14/D15)
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I2CSlave slave(PB_3, PB_10); // I2C_2 (Arduino: D3/D6)
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#elif defined (TARGET_NUCLEO_F429ZI) || defined (TARGET_DISCO_F429ZI) || defined (TARGET_NUCLEO_F446ZE)
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I2C master(PB_9, PB_8); // I2C_1 (Arduino: D14/D15)
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I2CSlave slave(PB_11, PB_10); // I2C_2
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#endif
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volatile int why;
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volatile bool master_complete = false;
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void cbmaster_done(int event) {
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printf("cbmaster_done\n");
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master_complete = true;
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why = event;
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}
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int main()
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{
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event_callback_t callback;
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bool success = true;
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char buf_master[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
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char buf_slave[SIZE];
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char res_master[SIZE];
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char buf_master_tx[] = {9, 8, 7, 6, 5, 4, 3, 2, 1, 0};
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char buf_master_rx[SIZE];
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char buf_slave_txrx[SIZE];
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callback.attach(cbmaster_done);
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master.frequency(FREQ);
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slave.frequency(FREQ);
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slave.address(ADDR);
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// First transfer: master to slave
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printf("\nFirst transfer: Master Tx, Repeated Start\n");
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master.transfer(ADDR, buf_master, SIZE, 0, 0, callback, I2C_EVENT_ALL, true);
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while (!master_complete) {
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if(slave.receive() == I2CSlave::WriteAddressed) {
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slave.read(buf_slave, SIZE);
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for(int i = 0; i < SIZE; i++){
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buf_slave[i]++;
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}
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}
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}
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if (why != I2C_EVENT_TRANSFER_COMPLETE) {
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printf("Transfer result: 0x%x\n", why);
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notify_completion(false);
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}
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master_complete = false;
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why = 0;
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printf("Transfer result: OK\n");
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// Second transfer: slave to master
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printf("\nSecond transfer: Master Rx\n");
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master.transfer(ADDR, 0, 0, res_master, SIZE, callback, I2C_EVENT_ALL, true);
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while (!master_complete) {
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if(slave.receive() == I2CSlave::ReadAddressed) {
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slave.write(buf_slave, SIZE);
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}
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}
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if (why != I2C_EVENT_TRANSFER_COMPLETE) {
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printf("Transfer result: 0x%x\n", why);
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notify_completion(false);
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}
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master_complete = false;
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why = 0;
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printf("Transfer result: OK\n");
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// Check first exchange success
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for(int i = 0; i < SIZE; i++) {
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if (res_master[i] != (buf_master[i] + 1)) {
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printf("Buffer check KO\n");
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printf("res_master[%d]: %d, buf_master[%d]: %d\n",i,res_master[i],i,buf_master[i]);
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notify_completion(false);
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break;
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}
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}
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printf("Buffer check OK\n");
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// Third transfer: Tx/Rx
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printf("\nThird transfer: Master Tx/Rx\n");
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master.transfer(ADDR, buf_master_tx, SIZE, buf_master_rx, SIZE, callback, I2C_EVENT_ALL, false);
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while (!master_complete) {
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int i = slave.receive();
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if(i == I2CSlave::WriteAddressed) {
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slave.read(buf_slave_txrx, SIZE);
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for(int i = 0; i < SIZE; i++){
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buf_slave_txrx[i]++;
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}
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}
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if((i == I2CSlave::ReadAddressed) ) {
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slave.write(buf_slave_txrx, SIZE);
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}
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}
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if (why != I2C_EVENT_TRANSFER_COMPLETE) {
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printf("Transfer result: 0x%x\n", why);
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notify_completion(false);
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}
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master_complete = false;
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why = 0;
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printf("Transfer result: OK\n");
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for(int i = 0; i < SIZE; i++) {
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if (buf_master_rx[i] != (buf_master_tx[i] + 1)) {
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printf("Buffer check KO\n");
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printf("buf_master_rx[%d]: %d, buf_master_tx[%d]: %d\n",i,buf_master_rx[i],i,buf_master_tx[i]);
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notify_completion(false);
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break;
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}
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}
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printf("Buffer check OK\n");
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notify_completion(success);
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}
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