Kazuki Yamamoto
/
uart_i2c_conv
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LPC824/main.cpp
- Committer:
- Kazuki Yamamoto
- Date:
- 2014-12-03
- Revision:
- 5:07f7000ec747
- Child:
- 9:844e301ab0fd
File content as of revision 5:07f7000ec747:
#include "mbed.h"
Serial pc(USBTX,USBRX);
//Serial mon(D1,NC);
/*
D5 = P0_28,
D6 = P0_16, // LED_GREEN
D7 = P0_17,
D8 = P0_13,
D9 = P0_27, // LED_BLUE
D10 = P0_15,
D11 = P0_26,
D12 = P0_25,
D13 = P0_24,
*/
I2C dev1(I2C_SDA,I2C_SCL);//11,10 hard coded
I2C dev2(A0,A1);//6,14
I2C dev3(A2,A3);//23,22
I2C dev4(A4,A5);//21,20
BusOut bus(LED1,LED2,LED3,LED4);
//DigitalOut led1(LED1);
//DigitalOut led2(LED2);
//DigitalOut led3(LED3);
//DigitalOut led4(LED4);
//Table 3. ASCII commands supported by SC18IM700
//ASCII command Hex value Command function
//[X] S 0x53 I2C-bus START
//[X] P 0x50 I2C-bus STOP
//[_] R 0x52 read SC18IM700 internal register
//[_] W 0x57 write to SC18IM700 internal register
//[_] I 0x49 read GPIO port
//[_] O 0x4F write to GPIO port
//[_] Z 0x5A power down
//[X] C 0x43 change channel
int main()
{
I2C* dev=&dev1;
pc.baud(115200);
//mon.baud(115200);
//pc.printf("%08X\n\r",LPC_IOCON->PIO0_11 );
//pc.printf("%08X\n\r",LPC_IOCON->PIO0_10 );
LPC_IOCON->PIO0_11 &= ~(0x02<<8);
LPC_IOCON->PIO0_11 |= (0x02<<8);
LPC_IOCON->PIO0_10 &= ~(0x02<<8);
LPC_IOCON->PIO0_10 |= (0x02<<8);
//pc.printf("%08X\n\r",LPC_IOCON->PIO0_11 );
//pc.printf("%08X\n\r",LPC_IOCON->PIO0_10 );
bool s=false;
dev1.frequency(800000);//100k
dev2.frequency(400000);//100k
dev3.frequency(400000);//100k
dev4.frequency(400000);//100k
pc.printf("%08X\n\r",LPC_IOCON->PIO0_11 );
pc.printf("%08X\n\r",LPC_IOCON->PIO0_10 );
//LPC_I2C0->CLKDIV &= 0xFFFFFF00;
//LPC_I2C0->CLKDIV |= 0x05;
//LPC_I2C0->MSTTIME &= 0xFFFFFF00;
//LPC_I2C0->MSTTIME |= 0x11;
//pc.printf("%08X\n\r",LPC_SYSCON->SYSAHBCLKDIV );
pc.printf("%08X\n\r",LPC_I2C0->CLKDIV );
pc.printf("%08X\n\r",LPC_I2C0->MSTTIME );
// int data=0x50;
int ack=0;
int plength=0;
char recieve[256];
char send[256];
char read=0;
int address=0,length=0,channel=0;
enum reg {
I2C0adr='0',
I2C1adr='1',
I2C2adr='2',
I2C3adr='3',
};
//"C0P"
//"S| 0x08 0x00| 0x00 0x04| 0xD0E0A0D0B0E0A0F|P"
//"C1P"
//"S(0x80)(4)(0xDEADBEAF)P"
//"C2P"
//"S(0x80)(4)(0xDEADBEAF)P"
//"C3P"
//"S(0x80)(4)(0xDEADBEAF)P"
//dev1.start();
//dev1.write(address);
//dev1.stop();
int i=0;
while(1) {
while(true) {
//// led1=0;
read=pc.getc();
recieve[i]=read;
//pc.printf("%02X,",read); //debug
i++;
if(read == 'P') {
plength=i;
//// led1=1;
//pc.printf("P\n\r");
break;
}
}
for(i=0;i<plength;i++){
//mon.printf("%02X,",recieve[i]); //debug
}
i=0;
while(i<plength) {
//mon.printf("%c,",recieve[i]);
switch(recieve[i]) {
case 'C':
{
channel=recieve[i+1];
switch(channel) {
case I2C0adr:
{
bus=~0x01;
//pc.printf("ch0 is selected,");
channel='0';
dev=&dev1;
break;
}
case I2C1adr:
{
bus=~0x02;
//pc.printf("ch1 is selected,");
channel='1';
dev=&dev2;
break;
}
case I2C2adr:
{
bus=~0x04;
//pc.printf("ch2 is selected,");
channel='2';
dev=&dev3;
break;
}
case I2C3adr:
{
bus=~0x08;
//pc.printf("ch3 is selected,");
channel='3';
dev=&dev4;
break;
}
default:
{
//pc.printf("ch? is not implemented,");
channel='0';
dev=&dev1;
break;
}
}
i+=(2);
break;
}
// S|0xD0|0x01|0xAA|S|0xD1|0x01|P
case 'S':
{
s=true;
//ack=((plength-i)>>1)+(0x01&recieve[(i+2)]);
ack=plength-2-(i+1)+(0x01&recieve[(i+2)]);
if( ack >=4){
//if(plength>=4){
address=0xff&(recieve[i+1]<<4|(recieve[i+2]&0x0F));
length=0xff&(recieve[i+3]<<4|(recieve[i+4]&0x0F));
}else{
pc.printf("bad packet! %d, %d, %02X, %d\n\r",plength,i,recieve[(i+2)]&0x0F,ack);
//mon.printf("bad packet! %d, %d, %02X, %d\n\r",plength,i,recieve[(i+2)]&0x0F,ack);
i=plength+1;
break;
}
//pc.printf("addr=%02X, length=%d,",address,length);
//dev1.start();
//dev1.write(address);
dev->start();
ack=dev->write(address);
//if(ack==0){
// dev->stop();
// pc.printf("0x%02X returned %d\n\r",address,ack);
// i=plength+1;
// break;
//}
//// dev->write(address);
if( (address&0x01)) {//read
//pc.printf("read from ch%c,",channel);
for(int j=0; j<length; j++) {
send[j]=dev->read(1);
//// pc.printf("%02X,",dev->read(1));
//pc.printf("%02X,",dev1.read(0));
}
i+=(5);
} else {//write
//pc.printf("write to ch%c, ",channel);
for(int j=0; j<(length*2); j+=2) {
//pc.printf("%02X,",recieve[3+j]);
//dev1.write(recieve[3+j]);
ack=dev->write( 0xff&(recieve[5+j] << 4 | (recieve[6+j] & 0x0F)) );
//pc.printf("ack=%d\n\r",ack);
}
i+=(5+length*2);
length=0;
}
break;
}
case 'P':
//dev1.stop();
if(s){
dev->stop();
s=false;
}
i=plength;
for(int j=0; j<length; j++) {
pc.printf("%02X,",send[j]);
//mon.printf("%02X,",send[j]);
}
pc.printf("ok\n\r");
//mon.printf("ok\n\r");
break;
case 'R':
pc.printf("command R is not implemented\n\r");
//mon.printf("command R is not implemented\n\r");
i=plength;
break;
case 'W':
pc.printf("command W is not implemented\n\r");
//mon.printf("command W is not implemented\n\r");
i=plength;
break;
case 'I':
pc.printf("command I is not implemented\n\r");
//mon.printf("command I is not implemented\n\r");
i=plength;
break;
case 'O':
pc.printf("command O is not implemented\n\r");
//mon.printf("command O is not implemented\n\r");
i=plength;
break;
case 'Z':
pc.printf("command Z is not implemented\n\r");
//mon.printf("command Z is not implemented\n\r");
i=plength;
break;
default:
pc.printf("command ? is not implemented\n\r");
//mon.printf("command %02X is not implemented\n\r",recieve[i]);
i=plength;
break;
}
}
i=0;
length=0;
}
}