Tutaj rozpoczęcie komunikacji:
A tutaj zawieszenie komunikacji:
A tutaj kod programu:
[syntax=c]#define BAUDRATE 100000
#define TWI_BAUD(F_SYS, F_TWI) ((F_SYS / (2 * F_TWI)) - 5);
#define TWI_BAUDSETTING TWI_BAUD(F_CPU, BAUDRATE);
#define MCP_ADDRESS 0xD4;
void TWI_MasterInit(){
TWIC.MASTER.BAUD = TWI_BAUDSETTING;;
TWIC.CTRL = 0x00; //SDA hold time OFF and normal TWI operation with two-pin interface
// enable TWI / I2C / SMBUS
TWIC.MASTER.CTRLA = TWI_MASTER_ENABLE_bm;
TWIC.MASTER.CTRLB = 0x00; //disable Inactive Bus Timeout, disable QCEN and SMEN
TWIC.MASTER.CTRLC = 0x00;
// force initial bus state to idle
TWIC.MASTER.STATUS = TWI_MASTER_BUSSTATE_IDLE_gc;
};
void MCP_write_buf(uint8_t len, uint8_t *buf)
{
TWIC.MASTER.ADDR = MCP_ADDRESS;
while (!(TWIC.MASTER.STATUS & TWI_MASTER_WIF_bm) || (TWIC.MASTER.STATUS & TWI_SLAVE_RXACK_bm));
while (len--)
{
TWIC.MASTER.DATA = *buf++;
while (!(TWIC.MASTER.STATUS & TWI_MASTER_WIF_bm));
}
TWIC.MASTER.CTRLC = TWI_MASTER_CMD_STOP_gc;
}
void MCP_read_buf(uint8_t len, uint8_t *buf)
{
TWIC.MASTER.ADDR = 0x01 + MCP_ADDRESS;
while (!(TWIC.MASTER.STATUS & TWI_MASTER_RIF_bm)) //|| (TWIC.MASTER.STATUS & TWI_SLAVE_RXACK_bm));
while (len--)
{
*buf++ = TWIC.MASTER.DATA;
TWIC.MASTER.CTRLC = TWI_MASTER_CMD_RECVTRANS_gc;
while (!(TWIC.MASTER.STATUS & TWI_MASTER_RIF_bm));
}
TWIC.MASTER.CTRLC = TWI_MASTER_CMD_STOP_gc;
}
//Pętla główna FCPU = 32Mhz TWI 100Khz
TWI_MasterInit();
uint8_t MCP_Configuration = 0b10011000;
MCP_write_buf(1,&MCP_Configuration);
while(1){
MCP_read_buf(4,&bb2);
}[/syntax]
Jakieś pomysły?
Statystyki: Napisane przez lcdk — 4 maja 2017, o 20:28
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