|
| 1 | +#include "mbed.h" |
| 2 | +#include "test_env.h" |
| 3 | +#include <stdio.h> |
| 4 | + |
| 5 | +#define ADDR (0x90) |
| 6 | +#define FREQ 100000 |
| 7 | +#define SIZE 10 |
| 8 | + |
| 9 | +// ******************************************************** |
| 10 | +// This tests data transfer between two I2C interfaces on |
| 11 | +// the same chip, one configured as master, the other as |
| 12 | +// slave. |
| 13 | +// |
| 14 | +// Wiring: |
| 15 | +// D14 <-> D3 |
| 16 | +// D15 <-> D6 |
| 17 | +// ******************************************************** |
| 18 | + |
| 19 | +#if defined(TARGET_NUCLEO_F411RE) |
| 20 | +I2C master(PB_9, PB_8); // I2C_1 (Arduino: D14/D15) |
| 21 | +I2CSlave slave(PB_3, PB_10); // I2C_2 (Arduino: D3/D6) |
| 22 | +#endif |
| 23 | + |
| 24 | +volatile int why; |
| 25 | +volatile bool master_complete = false; |
| 26 | +void cbmaster_done(int event) { |
| 27 | + printf("cbmaster_done\n"); |
| 28 | + master_complete = true; |
| 29 | + why = event; |
| 30 | +} |
| 31 | + |
| 32 | +int main() |
| 33 | +{ |
| 34 | + event_callback_t callback; |
| 35 | + bool success = true; |
| 36 | + char buf_master[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; |
| 37 | + char buf_slave[SIZE]; |
| 38 | + char res_master[SIZE]; |
| 39 | + char buf_master_tx[] = {9, 8, 7, 6, 5, 4, 3, 2, 1, 0}; |
| 40 | + char buf_master_rx[SIZE]; |
| 41 | + char buf_slave_txrx[SIZE]; |
| 42 | + |
| 43 | + callback.attach(cbmaster_done); |
| 44 | + |
| 45 | + master.frequency(FREQ); |
| 46 | + slave.frequency(FREQ); |
| 47 | + slave.address(ADDR); |
| 48 | + |
| 49 | + |
| 50 | + // First transfer: master to slave |
| 51 | + printf("\nFirst transfer: Master Tx, Repeated Start\n"); |
| 52 | + master.transfer(ADDR, buf_master, SIZE, 0, 0, callback, I2C_EVENT_ALL, true); |
| 53 | + |
| 54 | + while (!master_complete) { |
| 55 | + if(slave.receive() == I2CSlave::WriteAddressed) { |
| 56 | + slave.read(buf_slave, SIZE); |
| 57 | + for(int i = 0; i < SIZE; i++){ |
| 58 | + buf_slave[i]++; |
| 59 | + } |
| 60 | + } |
| 61 | + } |
| 62 | + if (why != I2C_EVENT_TRANSFER_COMPLETE) { |
| 63 | + printf("Transfer result: 0x%x\n", why); |
| 64 | + notify_completion(false); |
| 65 | + } |
| 66 | + master_complete = false; |
| 67 | + why = 0; |
| 68 | + printf("Transfer result: OK\n"); |
| 69 | + |
| 70 | + // Second transfer: slave to master |
| 71 | + printf("\nSecond transfer: Master Rx\n"); |
| 72 | + master.transfer(ADDR, 0, 0, res_master, SIZE, callback, I2C_EVENT_ALL, true); |
| 73 | + |
| 74 | + while (!master_complete) { |
| 75 | + if(slave.receive() == I2CSlave::ReadAddressed) { |
| 76 | + slave.write(buf_slave, SIZE); |
| 77 | + } |
| 78 | + } |
| 79 | + if (why != I2C_EVENT_TRANSFER_COMPLETE) { |
| 80 | + printf("Transfer result: 0x%x\n", why); |
| 81 | + notify_completion(false); |
| 82 | + } |
| 83 | + master_complete = false; |
| 84 | + why = 0; |
| 85 | + printf("Transfer result: OK\n"); |
| 86 | + |
| 87 | + // Check first exchange success |
| 88 | + for(int i = 0; i < SIZE; i++) { |
| 89 | + if (res_master[i] != (buf_master[i] + 1)) { |
| 90 | + printf("Buffer check KO\n"); |
| 91 | + printf("res_master[%d]: %d, buf_master[%d]: %d\n",i,res_master[i],i,buf_master[i]); |
| 92 | + notify_completion(false); |
| 93 | + break; |
| 94 | + } |
| 95 | + } |
| 96 | + printf("Buffer check OK\n"); |
| 97 | + |
| 98 | + // Third transfer: Tx/Rx |
| 99 | + printf("\nThird transfer: Master Tx/Rx\n"); |
| 100 | + master.transfer(ADDR, buf_master_tx, SIZE, buf_master_rx, SIZE, callback, I2C_EVENT_ALL, false); |
| 101 | + |
| 102 | + while (!master_complete) { |
| 103 | + |
| 104 | + int i = slave.receive(); |
| 105 | + |
| 106 | + if(i == I2CSlave::WriteAddressed) { |
| 107 | + slave.read(buf_slave_txrx, SIZE); |
| 108 | + for(int i = 0; i < SIZE; i++){ |
| 109 | + buf_slave_txrx[i]++; |
| 110 | + } |
| 111 | + } |
| 112 | + if((i == I2CSlave::ReadAddressed) ) { |
| 113 | + slave.write(buf_slave_txrx, SIZE); |
| 114 | + } |
| 115 | + } |
| 116 | + if (why != I2C_EVENT_TRANSFER_COMPLETE) { |
| 117 | + printf("Transfer result: 0x%x\n", why); |
| 118 | + notify_completion(false); |
| 119 | + } |
| 120 | + master_complete = false; |
| 121 | + why = 0; |
| 122 | + printf("Transfer result: OK\n"); |
| 123 | + |
| 124 | + for(int i = 0; i < SIZE; i++) { |
| 125 | + if (buf_master_rx[i] != (buf_master_tx[i] + 1)) { |
| 126 | + printf("Buffer check KO\n"); |
| 127 | + printf("buf_master_rx[%d]: %d, buf_master_tx[%d]: %d\n",i,buf_master_rx[i],i,buf_master_tx[i]); |
| 128 | + notify_completion(false); |
| 129 | + break; |
| 130 | + } |
| 131 | + } |
| 132 | + printf("Buffer check OK\n"); |
| 133 | + notify_completion(success); |
| 134 | +} |
| 135 | + |
0 commit comments