Kazuki Yamamoto
/
uart_i2c_conv
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LPC824/main.cpp
- Committer:
- Kazuki Yamamoto
- Date:
- 2014-12-16
- Revision:
- 26:7810c849cb78
- Parent:
- 24:223a68f33f09
- Child:
- 27:53a29982d658
File content as of revision 26:7810c849cb78:
/** uart_i2c_conv for LPC824
*/
#include "mbed.h"
#define QUAD_I2C
Serial pc(USBTX,USBRX);
/** replace
Serial pc(P0_4, P0_0);
*/
I2C dev1(I2C_SDA, I2C_SCL);//11,10 hard coded
#ifdef QUAD_I2C
I2C dev2(P0_6, P0_14);//6,14 | A0, A1
I2C dev3(P0_23, P0_22);//23,22 | A2, A3
I2C dev4(P0_21, P0_20);//21,20 | A4, A5
/** replace
I2C dev2(P0_16, P0_27);
I2C dev3(P0_26, P0_25);
I2C dev4(P0_24, P0_15);
*/
#else
DigitalInOut _GPIO10(P0_15);
DigitalInOut _GPIO11(P0_24);
DigitalInOut _GPIO12(P0_25);
DigitalInOut _GPIO13(P0_26);
DigitalInOut _GPIO14(P0_27);
DigitalInOut _GPIO15(P0_16);
DigitalInOut _GPIO16(P0_28);
DigitalInOut _GPIO17(P0_12);
#endif
DigitalInOut _GPIO0(D0); // P0_0
DigitalInOut _GPIO1(D1); // P0_4
DigitalInOut _GPIO2(D2); // P0_19
DigitalInOut _GPIO3(P0_1); //
DigitalInOut _GPIO4(D5); // P0_28
DigitalInOut _GPIO5(D7); // P0_17
DigitalInOut _GPIO6(D8); // P0_13
DigitalInOut _GPIO7(D10); // P0_15
/** replace
DigitalInOut _GPIO00(P0_17);
DigitalInOut _GPIO01(P0_18);
DigitalInOut _GPIO02(P0_19);
DigitalInOut _GPIO03(P0_20);
DigitalInOut _GPIO04(P0_21);
DigitalInOut _GPIO05(P0_22);
DigitalInOut _GPIO06(P0_23);
DigitalInOut _GPIO07(P0_14);
*/
SPI _spi(D11, D12, D13); // mosi, miso, sclk
DigitalOut _cs(D9); // CS
/** replace
SPI _spi(P0_6, P0_7, P0_8); // mosi, miso, sclk
DigitalOut _cs(P0_9) // CS
*/
//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
//[_] E 0x45 enable chip
//[_] V 0x__ enable VDDIO output to chip
/**
"C| '0'| P"
"C| '1'| P"
"C| '2'| P"
"C| '3'| P"
"S| 0x_8 _0| 0x_0 _4| 0x_D _E _A _D _B _E _A _F| P"
"S| 0x_8 _0| 0x_0 _4| 0x_D _E _A _D _B _E _A _F| S| 0x_8 _1| 0x_0 _4| P"
"S| 0x_8 _1| 0x_0 _4| P"
"R| '0'| P"
"R| '0'| '1'| ...| P"
"W| '0' 0x_a _a| P"
"W| '0' 0x_a _a| '1' 0x_b _b| ...| P"
"I| '0'| P"
"O| '0'| 0x_a _a| P"
*/
int main()
{
I2C* dev=&dev1;
pc.baud(115200);
bool s = false;
dev1.frequency(900000);//900k; works around 940kHz with 200ohm pullups/ not work at 1M?
LPC_IOCON->PIO0_11 &= ~(0x03<<8);
LPC_IOCON->PIO0_11 |= (0x02<<8);
LPC_IOCON->PIO0_10 &= ~(0x03<<8);
LPC_IOCON->PIO0_10 |= (0x02<<8);
// LPC_I2C0->CLKDIV &= 0xFFFFFF00;
// LPC_I2C0->CLKDIV |= 0x05;
// LPC_I2C0->MSTTIME &= 0xFFFFFF00;
// LPC_I2C0->MSTTIME |= 0x00;
#ifdef QUAD_I2C
dev2.frequency(400000);//400k
dev3.frequency(400000);//400k
dev4.frequency(400000);//400k
#else
DigitalInOut* gpio1[]={
&_GPI10,
&_GPI11,
&_GPI12,
&_GPI13,
&_GPI14,
&_GPI15,
&_GPI16,
&_GPI17,
};
for(int k=0; k<8; k++){
gpio1[k]->input();
gpio1[k]->mode(PullDown);
}
#endif
DigitalInOut* gpio0[]={
&_GPIO0,
&_GPIO1,
&_GPIO2,
&_GPIO3,
&_GPIO4,
&_GPIO5,
&_GPIO6,
&_GPIO7,
};
for(int k=0; k<8; k++){
gpio0[k]->input();
gpio0[k]->mode(PullDown);
}
int ack = 0;
int plength = 0;
char recieve[] = {
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
};
char send[] = {
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
0x0D, 0x0E, 0x0A, 0x0D, 0x0B, 0x0E, 0x0A, 0x0F, 0xD0, 0xE0, 0xA0, 0xD0, 0xB0, 0xE0, 0xA0, 0xF0,
};
char read = 0;
int address = 0;
int data = 0;
int _data = 0;
int length = 0;
int channel = 0;
bool CE = false;
enum command_e {
CMD_S='S',
CMD_P='P',
CMD_C='C',
CMD_R='R',
CMD_W='W',
CMD_I='I',
CMD_O='O',
};
enum channel_e {
CH0 = '0',
CH1 = '1',
CH2 = '2',
CH3 = '3',
};
enum register_e {
CHIP_ID = '0',
GPIO0_STAT = '1',
GPIO1_STAT = '2',
GPIO0_CONF = '3',
GPIO1_CONF = '4',
REG5,
REG6,
REG7,
REG8,
REG9,
};
enum chipID_e {
ID_LPC824 = '0',
ID_LPC1768 = '1',
ID_LPC11UXX = '2',
};
static const uint8_t chip_id=ID_LPC824;
static uint8_t registers[]={
chip_id,
0xBB,
0xCC,
0xDD,
0xEE,
REG5,
REG6,
REG7,
REG8,
REG9,
};
int i=0;
while(1) {
i=0;
length=0;
while(true) {
read=pc.getc();
recieve[i]=read;
i++;
if(read == 'P') {
plength=i;
break;
}
}
i=0;
while(i < plength) {
switch(recieve[i]) {
case CMD_C:
{
channel=recieve[i+1];
switch(channel) {
case CH0:
{
channel = CH0;
dev=&dev1;
break;
}
#ifdef QUAD_I2C
case CH1:
{
channel = CH1;
dev=&dev2;
break;
}
case CH2:
{
channel = CH2;
dev=&dev3;
break;
}
case CH3:
{
channel = CH3;
dev=&dev4;
break;
}
#endif
default:
{
channel = CH0;
dev=&dev1;
break;
}
}
i+=(2);
break;
}
case CMD_S:
{
s = true;
ack = plength - 2 - (i+1) + (recieve[i+2] & 0x01);
if(ack >= 4){ //valid packet
address = 0xff & (recieve[i+1] << 4 | (recieve[i+2] & 0x0F));
length = 0xff & (recieve[i+3] << 4 | (recieve[i+4] & 0x0F));
if(address & 0x01) { //read
dev->read(address, send, length, false); //added
i+=(5);
} else { // write
for(int j=0; j < (length * 2); j+=2) {
ack = 0xff&((recieve[5+j] << 4) | (recieve[6+j] & 0x0F));
*(send+(j/2)) = ack; //added
}
dev->write(address, send, length, true); //added
i+=(5 + length * 2);
length=0;
}
}else{
pc.printf("bad packet! %d, %d, %02X, %d\n\r",plength,i,recieve[(i+2)]&0x0F,ack);
i = plength;
}
break;
}
case CMD_P:
{
if(s){
dev->stop();
s = false;
}
i = plength;
for(int j=0; j<length; j++) {
pc.printf("%02X,",send[j]);
}
pc.printf("ok\n\r");
break;
}
case CMD_R:
{
length = plength - 2;
if(length<1){
pc.printf("bad packet! %d\n\r",length);
i = plength + 1;
length = 0;
}else{
for(int j=0; j<length; j++){
address = recieve[i+1+j];
switch(address){
case CHIP_ID:
{
data = chip_id;
break;
}
case GPIO0_STAT:
{
data = registers[GPIO0_STAT-'0'];
break;
}
case GPIO0_CONF:
{
data = registers[GPIO0_CONF-'0'];
break;
}
case GPIO1_STAT:
{
data = registers[GPIO1_STAT-'0'];
break;
}
case GPIO1_CONF:
{
data = registers[GPIO1_CONF-'0'];
break;
}
default:
{
data = 0xAA;
break;
}
}
send[j] = (char)data;
}
i += (length+1);
}
break;
}
case CMD_W:
{
length = plength - 2;
if(length < 3){
pc.printf("bad packet! %d\n\r",length);
i = plength + 1;
length = 0;
}else{
for(int j=0; j<length; j+=3){
address = recieve[i+1+j];
data = 0xff & (recieve[i+2+j] << 4 | (recieve[i+3+j] & 0x0F));
switch(address){
case CHIP_ID:
{
//READ ONLY: do nothing
data = registers[CHIP_ID-'0'];
break;
}
case GPIO0_STAT:
{
//READ ONLY from this command: do nothing
data = registers[GPIO0_STAT-'0'];
break;
}
case GPIO0_CONF:
{
registers[GPIO0_CONF-'0'] = data;
for(int k=0; k<8; k++){
if(data&0x01){//output
gpio0[k]->output();
}else{//input
gpio0[k]->input();
gpio0[k]->mode(PullUp);
}
data >>= 1;
}
data = registers[GPIO0_CONF-'0'];
break;
}
case GPIO1_STAT:
{
//READ ONLY from this command: do nothing
data = registers[GPIO1_STAT-'0'];
break;
}
case GPIO1_CONF:
{
registers[GPIO1_CONF-'0'] = data;
#ifndef QUAD_I2C
for(int k=0; k<6; k++){
if(data&0x01){//output
gpio1[k]->output();
}else{//input
gpio1[k]->input();
gpio1[k]->mode(PullUp);
}
data >>= 1;
}
#endif
data = registers[GPIO1_CONF-'0'];
break;
}
default:
{
break;
}
}
send[j/3] = (char)data;
}
i += length+1;
length /= 3;
}
break;
}
case CMD_I:
{
length = plength - 2;
data = 0;
if(length != 0){
pc.printf("bad packet! %d\n\r",length);
i = plength + 1;
length = 0;
}else{
for(int j=0; j<8; j++){
_data = gpio0[j]->read();
pc.printf("_%02X, ",_data);
data |= (_data << j);
}
registers[GPIO0_STAT-'0'] = data;
send[0] = data;
length = 1;
}
pc.printf("%02X, ",data);
i+=length;
break;
}
case CMD_O:
{
length = plength - 2;
if(length != 2){
pc.printf("bad packet! %d\n\r",length);
i = plength + 1;
length = 0;
}else{
data = 0xff & (recieve[i+1] << 4 | (recieve[i+2] & 0x0F));
_data = registers[GPIO0_CONF-'0'];
send[0] = (char)data;
for(int j=0; j<8; j++){
if(_data&0x01){ // output
gpio0[j]->write(data&0x01);
}else{ // input
; // do nothing
}
data >>= 1;
_data >>= 1;
}
i += length+1;
length = 1;
}
// pc.printf("command O is not implemented, ");
break;
}
case 'Z':
{
pc.printf("command Z is not implemented\n\r");
i=plength;
break;
}
case 'E':
{
pc.printf("command E is not implemented\n\r");
i=plength;
break;
}
case 'V':
{
pc.printf("command V is not implemented\n\r");
i=plength;
break;
}
default:
{
pc.printf("command %c is not implemented\n\r", recieve[i]);
i=plength;
break;
}
}
}
i=0;
length=0;
}
}