Marek Trojan / _8_CONV

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Dependencies:   mbed-src

Fork of _8_CONV_1_SLAVE by Marek Trojan

main.cpp@8:47ae8b74cd43, 2015-12-18 (annotated)

Committer:
marcus255
Date:
Fri Dec 18 00:01:28 2015 +0000
Revision:
8:47ae8b74cd43
Parent:
7:e86480c767ea
Child:
9:58c110e686f0
the same conv software uploaded to both KL05, memory communication ok, sensor communication fails

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcus255 0:ab0f6f4ef7ac 1 // Conv1 Slave
marcus255 0:ab0f6f4ef7ac 2 #include "main.h"
marcus255 0:ab0f6f4ef7ac 3
marcus255 7:e86480c767ea 4 int main()
marcus255 7:e86480c767ea 5 {
marcus255 7:e86480c767ea 6 init_conv();
marcus255 0:ab0f6f4ef7ac 7 while (1) {}
marcus255 0:ab0f6f4ef7ac 8 }
marcus255 0:ab0f6f4ef7ac 9
marcus255 8:47ae8b74cd43 10 void onUartChar()
marcus255 8:47ae8b74cd43 11 {
marcus255 8:47ae8b74cd43 12 NVIC_DisableIRQ(UART0_IRQn); // TODO: check if this statement is necessary here
marcus255 8:47ae8b74cd43 13 char first_char = device.getc();
marcus255 8:47ae8b74cd43 14 if (first_char == SET_CONV2_FUNCT){
marcus255 8:47ae8b74cd43 15 char slave_address = device.getc(); // not used at all, may be delete latar
marcus255 8:47ae8b74cd43 16 int i2c_frequency = 1000 * (int)device.getc();
marcus255 8:47ae8b74cd43 17 init_conv2(i2c_frequency);
marcus255 8:47ae8b74cd43 18 }
marcus255 8:47ae8b74cd43 19 else if (first_char == DATA_TO_WRITE_CHAR) {
marcus255 8:47ae8b74cd43 20 char received = device.getc();
marcus255 8:47ae8b74cd43 21 if (received & 0x01 == 0x01) { // reading from slave
marcus255 8:47ae8b74cd43 22 char rec;
marcus255 8:47ae8b74cd43 23 if (!transmission) {
marcus255 8:47ae8b74cd43 24 i2c.start();
marcus255 8:47ae8b74cd43 25 transmission = 1;
marcus255 8:47ae8b74cd43 26 }
marcus255 8:47ae8b74cd43 27 if (i2c.write((int)rec)) {
marcus255 8:47ae8b74cd43 28 while (device.getc() == DATA_TO_READ_CHAR) {
marcus255 8:47ae8b74cd43 29 rec = (char)i2c.read(1);
marcus255 8:47ae8b74cd43 30 device.putc(UART_CHAR_INCOMING);
marcus255 8:47ae8b74cd43 31 device.putc(rec);
marcus255 8:47ae8b74cd43 32 }
marcus255 8:47ae8b74cd43 33 i2c.read(0);
marcus255 8:47ae8b74cd43 34 } else {
marcus255 8:47ae8b74cd43 35 device.putc(UART_NON_CONFIRMATION_CHAR);
marcus255 8:47ae8b74cd43 36 }
marcus255 8:47ae8b74cd43 37 device.putc(END_OF_TRANSMISSION);
marcus255 8:47ae8b74cd43 38 } else { // writing to slave
marcus255 8:47ae8b74cd43 39 if (!transmission) {
marcus255 8:47ae8b74cd43 40 i2c.start();
marcus255 8:47ae8b74cd43 41 transmission = 1;
marcus255 8:47ae8b74cd43 42 }
marcus255 8:47ae8b74cd43 43 if (i2c.write((int)received))
marcus255 8:47ae8b74cd43 44 device.putc(UART_CONFIRMATION_CHAR);
marcus255 8:47ae8b74cd43 45 else {
marcus255 8:47ae8b74cd43 46 device.putc(UART_NON_CONFIRMATION_CHAR);
marcus255 8:47ae8b74cd43 47 }
marcus255 8:47ae8b74cd43 48 while (device.getc() == DATA_TO_WRITE_CHAR) {
marcus255 8:47ae8b74cd43 49 received = device.getc();
marcus255 8:47ae8b74cd43 50 if (i2c.write((int)received))
marcus255 8:47ae8b74cd43 51 device.putc(UART_CONFIRMATION_CHAR);
marcus255 8:47ae8b74cd43 52 else {
marcus255 8:47ae8b74cd43 53 device.putc(UART_NON_CONFIRMATION_CHAR);
marcus255 8:47ae8b74cd43 54 break;
marcus255 8:47ae8b74cd43 55 }
marcus255 8:47ae8b74cd43 56 }
marcus255 8:47ae8b74cd43 57 }
marcus255 8:47ae8b74cd43 58 }
marcus255 8:47ae8b74cd43 59 transmission = 0;
marcus255 8:47ae8b74cd43 60 NVIC_EnableIRQ(UART0_IRQn); // TODO: check if this statement is necessary here
marcus255 8:47ae8b74cd43 61 }
marcus255 8:47ae8b74cd43 62
marcus255 7:e86480c767ea 63 void on_SDA_falling_slope_interrupt(void)
marcus255 7:e86480c767ea 64 {
marcus255 0:ab0f6f4ef7ac 65 SDA_interrupt.disable_irq();
marcus255 0:ab0f6f4ef7ac 66 char addr = (char)slave.read();
marcus255 7:e86480c767ea 67 if (addr & 0x01 == 0x01) { //reading from slave
marcus255 7:e86480c767ea 68 char uart_rec2;
marcus255 7:e86480c767ea 69 device.putc(DATA_TO_WRITE_CHAR);
marcus255 7:e86480c767ea 70 device.putc(addr);
marcus255 7:e86480c767ea 71 while(1) {
marcus255 7:e86480c767ea 72 device.putc(DATA_TO_READ_CHAR);
marcus255 7:e86480c767ea 73 while(1) { // waiting for data byte from conv2
marcus255 7:e86480c767ea 74 if(device.readable()) {
marcus255 7:e86480c767ea 75 if (device.getc() == UART_CHAR_INCOMING) {
marcus255 7:e86480c767ea 76 uart_rec2 = device.getc();
marcus255 7:e86480c767ea 77 break;
marcus255 7:e86480c767ea 78 }
marcus255 7:e86480c767ea 79 }
marcus255 7:e86480c767ea 80 }
marcus255 7:e86480c767ea 81 if(!slave.write(uart_rec2)) {
marcus255 7:e86480c767ea 82 device.putc(END_OF_TRANSMISSION);
marcus255 7:e86480c767ea 83 break;
marcus255 7:e86480c767ea 84 }
marcus255 7:e86480c767ea 85 }
marcus255 7:e86480c767ea 86 slave.read();
marcus255 7:e86480c767ea 87 } else {
marcus255 0:ab0f6f4ef7ac 88 count = 0;
marcus255 0:ab0f6f4ef7ac 89 char uart_rec;
marcus255 0:ab0f6f4ef7ac 90 device.putc(DATA_TO_WRITE_CHAR);
marcus255 0:ab0f6f4ef7ac 91 device.putc(addr);
marcus255 4:9e2adff677ac 92 while(!SDA_state) { //writting to slave
marcus255 0:ab0f6f4ef7ac 93 buffer = (char)slave.read();
marcus255 7:e86480c767ea 94 for(int y = 0; y < 1024; y++) {} //some delay required for signal establishment
marcus255 0:ab0f6f4ef7ac 95 if(SDA_state) break;
marcus255 0:ab0f6f4ef7ac 96 device.putc(DATA_TO_WRITE_CHAR);
marcus255 7:e86480c767ea 97 device.putc(buffer);
marcus255 7:e86480c767ea 98
marcus255 0:ab0f6f4ef7ac 99 while(1) { // waiting until confirmation char is received from converter 2
marcus255 0:ab0f6f4ef7ac 100 if(device.readable()) {
marcus255 0:ab0f6f4ef7ac 101 uart_rec = device.getc();
marcus255 0:ab0f6f4ef7ac 102 if(uart_rec == UART_CONFIRMATION_CHAR || uart_rec == UART_NON_CONFIRMATION_CHAR)
marcus255 0:ab0f6f4ef7ac 103 break;
marcus255 0:ab0f6f4ef7ac 104 }
marcus255 0:ab0f6f4ef7ac 105 }
marcus255 0:ab0f6f4ef7ac 106 if (uart_rec == UART_NON_CONFIRMATION_CHAR)
marcus255 0:ab0f6f4ef7ac 107 break;
marcus255 7:e86480c767ea 108 }
marcus255 0:ab0f6f4ef7ac 109 device.putc(END_OF_TRANSMISSION);
marcus255 0:ab0f6f4ef7ac 110 }
marcus255 0:ab0f6f4ef7ac 111 SDA_interrupt.enable_irq();
marcus255 0:ab0f6f4ef7ac 112 }
marcus255 0:ab0f6f4ef7ac 113
marcus255 7:e86480c767ea 114 void init_conv(void)
marcus255 7:e86480c767ea 115 {
marcus255 7:e86480c767ea 116 SCL_interrupt.rise(&on_SCL_rising_slope_interrupt);
marcus255 0:ab0f6f4ef7ac 117 device.baud(921600);
marcus255 7:e86480c767ea 118 discovered_address = 0;
marcus255 7:e86480c767ea 119 clk_count = 0;
marcus255 8:47ae8b74cd43 120 device.attach(&onUartChar);
marcus255 7:e86480c767ea 121 }
marcus255 7:e86480c767ea 122
marcus255 7:e86480c767ea 123 void init_conv1(int frequency, char address)
marcus255 7:e86480c767ea 124 {
marcus255 7:e86480c767ea 125 slave.frequency(frequency);
marcus255 7:e86480c767ea 126 slave.address(address);
marcus255 7:e86480c767ea 127 SDA_interrupt.fall(&on_SDA_falling_slope_interrupt);
marcus255 7:e86480c767ea 128 }
marcus255 7:e86480c767ea 129
marcus255 8:47ae8b74cd43 130 void init_conv2(int frequency)
marcus255 7:e86480c767ea 131 {
marcus255 8:47ae8b74cd43 132 i2c.frequency(frequency);
marcus255 7:e86480c767ea 133 }
marcus255 7:e86480c767ea 134
marcus255 7:e86480c767ea 135 void on_SCL_rising_slope_interrupt(void)
marcus255 7:e86480c767ea 136 {
marcus255 7:e86480c767ea 137 if (clk_count<9) {
marcus255 7:e86480c767ea 138 if (SDA_state)
marcus255 7:e86480c767ea 139 discovered_address |= (0x01<<(7-clk_count));
marcus255 7:e86480c767ea 140 clk_count++;
marcus255 7:e86480c767ea 141 } else {
marcus255 7:e86480c767ea 142 SCL_interrupt.disable_irq();
marcus255 8:47ae8b74cd43 143 frequency = I2C_FREQUENCY;
marcus255 7:e86480c767ea 144 device.putc(SET_CONV2_FUNCT);
marcus255 7:e86480c767ea 145 device.putc(discovered_address);
marcus255 8:47ae8b74cd43 146 device.putc((char)(frequency/1000)); //in kHz
marcus255 7:e86480c767ea 147 init_conv1(frequency, (char)discovered_address);
marcus255 7:e86480c767ea 148 }
marcus255 0:ab0f6f4ef7ac 149 }