void USb2512Init(void)
{
uint8_t status;
HUB_RESET_0;
_wait();
HUB_RESET_1;
_wait();
uint8_t buffer[32];
const uint8_t reset = 0x02;
const uint8_t start = 0x01;
// Reset the USB hub
if (i2c_write_block(HUB_ADDRESS, STCD, &reset, 1)) {
puts("Failed to reset the USB hub");
return;
}
// Configure the USB hub
if (i2c_write_block(HUB_ADDRESS, 0, hub_registers, sizeof(hub_registers))) {
puts("Failed to configure the USB hub");
return;
}
// Start the USB hub with the new settings
if (i2c_write_block(HUB_ADDRESS, STCD, &start, 1)) {
puts("Failed to start the USB hub");
return;
}
puts("USB Hub successfully configured.");
}
int main(int argc, char *argv[]) {
int fd, i;
unsigned char value;
unsigned char wbuf[] = { 0x11, 0x22, 0x33, 0x44, 0x55 };
unsigned char rbuf[sizeof(wbuf)];
// 打开i2c总线1，需要根据具体情况来的打开
fd = i2c_open_dev(1);
if (fd < 0) {
// 打开失败，可能是没有该i2c总线
printf("open i2c fail %d\n", fd);
exit(1);
}
// 设置i2c从设备地址为0x22
if(i2c_change_slave(fd, 0x22)<0){
printf("set slave failed\n");
close(fd);
exit(2);
}
printf("byte test...\n");
// 单字节写入
printf("write..\n");
for(i=0; i<256; ++i){
value = i;
if(i2c_write(fd, i, value)==1){
// 写入成功
printf("[%02x]=%02x ", i, value);
}
else{
// 写入失败
printf("[%02x]=XX ", i);
}
if(i%8==7)
printf("\n");
}
// 读取
printf("read..\n");
for(i=0; i<256; ++i){
if(i2c_read(fd, i, &value)==1){
// 读取成功
printf("[%02x]=%02x ", i, value);
}
else{
// 读取失败
printf("[%02x]=XX ", i);
}
if(i%8==7)
printf("\n");
}
printf("block test...\n");
// 块写入
if(i2c_write_block(fd, 0, wbuf, sizeof(wbuf))!=sizeof(wbuf)){
printf("i2c_write_block failed\n");
}
// 块读出
if(i2c_read_block(fd, 0, rbuf, sizeof(rbuf))!=sizeof(rbuf)){
printf("i2c_read_block failed\n");
}
else{
for(i=0; i<sizeof(rbuf); ++i){
printf("r[%02x]=%02x\n", i, rbuf[i]);
}
}
// 最后关闭文件
close(fd);
return 0;
}