| 6,40 → 6,32 |
|---|
| |
| void SPI2_Init(unsigned char speed) { |
| // Set up SPI2 with specified pins |
| RPINR22 = 7; // SPI2 CLK Input (Pin RB4) |
| RPOR7 = 11; // SPI2 CLK Output (Pin RB4) |
| RPINR22 = PPS_SPI2_CLK_IN; // SPI2 CLK Input (Pin RB4) |
| PPS_SPI2_CLK_OUT = 11; // SPI2 CLK Output (Pin RB4) |
| #ifndef SPI2_WRITE_ONLY |
| RPINR21 = 6; // SPI2 Data Input (Pin RB3) |
| RPINR21 = PPS_SPI2_MISO; // SPI2 Data Input (Pin RB3) |
| #endif |
| RPOR5 = 10; // SPI2 Data Output (MOSI) (Pin RB2) |
| PPS_SPI2_MOSI = 10; // SPI2 Data Output (MOSI) (Pin RB2) |
| |
| TRISBbits.TRISB4 = 0; // SPI2 clock pin (Pin RB4) |
| SPI_CLK_TRIS = 0; // SPI2 clock pin (Pin RB4) |
| #ifndef SPI2_WRITE_ONLY |
| TRISBbits.TRISB3 = 1; // SPI2 data in pin (Pin RB3)(MISO) |
| SPI_MISO_TRIS = 1; // SPI2 data in pin (Pin RB3)(MISO) |
| #endif |
| TRISBbits.TRISB2 = 0; // SPI2 data out pin (Pin RB2)(MOSI) |
| SPI_MOSI_TRIS = 0; // SPI2 data out pin (Pin RB2)(MOSI) |
| |
| TRISBbits.TRISB7 = 0; // SPI2 slave select (Pin RB7) |
| LATBbits.LATB7 = 1; // SPI2 SS high (Idle) |
| SPI_SLAVE_SELECT_TRIS = 0; // SPI2 slave select (Pin RB7) |
| SPI_SLAVE_SELECT_LAT = 1; // SPI2 SS high (Idle) |
| |
| TRISBbits.TRISB6 = 0; // SPI2 reset (Pin RB6) |
| LATBbits.LATB6 = 1; // SPI2 reset active low |
| SPI_RESET_TRIS = 0; // SPI2 reset (Pin RB6) |
| SPI_RESET_LAT = 1; // SPI2 reset active low |
| |
| TRISBbits.TRISB5 = 0; // SPI2 D/C select (Pin RB5) |
| LATBbits.LATB5 = 0; |
| SPI_DC_SELECT_TRIS = 0; // SPI2 D/C select (Pin RB5) |
| SPI_DC_SELECT_LAT = 0; |
| |
| SSP2STATbits.SMP = 0; // Input is sampled in the middle of data output time |
| SSP2STATbits.CKE = 0; // Transmit occurs on transition from Idle to active clock state |
| |
| SSP2CON1bits.SSPM = speed; |
| // if (speed == SPI2_FOSC_4) |
| // SSP2CON1bits.SSPM = 0b0000; // Clock = FOSC/4 |
| // else if (speed == SPI2_FOSC_8) |
| // SSP2CON1bits.SSPM = 0b1010; // Clock = FOSC/8 |
| // else if (speed == SPI2_FOSC_16) |
| // SSP2CON1bits.SSPM = 0b0001; // Clock = FOSC/16 |
| // else |
| // SSP2CON1bits.SSPM = 0b0010; // Clock = FOSC/64 |
| |
| SSP2CON1bits.CKP = 1; // Idle state for clock is a high level |
| SSP2CON1bits.SSPEN = 1; // Enable MSSP module |
| 79,7 → 71,7 |
|---|
| SSP2BUF = spi_data_p->buffer_out[spi_data_p->buffer_out_ind]; |
| spi_data_p->buffer_out_ind++; |
| } else { |
| LATBbits.LATB2 = 1; // Bring SS line high |
| SPI_SLAVE_SELECT_LAT = 1; // Bring SS line high |
| spi_data_p->buffer_out_ind = 0; |
| spi_data_p->buffer_out_len = 0; |
| } |
| 95,12 → 87,12 |
|---|
| for (i = 0; i < length; i++) { |
| spi_data_p->buffer_out[i] = msg[i]; |
| } |
| LATBbits.LATB7 = 0; // Bring SS line low |
| SPI_SLAVE_SELECT_LAT = 0; // Bring SS line low |
| SSP2BUF = spi_data_p->buffer_out[0]; // Transmit first byte |
| #else |
| unsigned int i = 0; |
| unsigned char tmp = 0; |
| LATBbits.LATB7 = 0; |
| SPI_SLAVE_SELECT_LAT = 0; |
| while (i != length) { |
| SSP2BUF = msg[i]; |
| i++; |
| 119,7 → 111,7 |
|---|
| tmp = SSP2BUF; |
| #endif |
| } |
| LATBbits.LATB7 = 1; |
| SPI_SLAVE_SELECT_LAT = 1; |
| #endif |
| } |
| |
| 129,7 → 121,7 |
|---|
| #else |
| unsigned int i = 0; |
| unsigned char tmp = 0; |
| LATBbits.LATB7 = 0; |
| SPI_SLAVE_SELECT_LAT = 0; |
| while (i != length) { |
| SSP2BUF = c; |
| i++; |
| 148,7 → 140,7 |
|---|
| tmp = SSP2BUF; |
| #endif |
| } |
| LATBbits.LATB7 = 1; |
| SPI_SLAVE_SELECT_LAT = 1; |
| #endif |
| } |
| |
| 160,11 → 152,11 |
|---|
| for (i = 0; i < length; i++) { |
| spi_data_p->buffer_out[i] = 0x0; |
| } |
| LATBbits.LATB7 = 0; // Bring SS line low |
| SPI_SLAVE_SELECT_LAT = 0; // Bring SS line low |
| SSP2BUF = spi_data_p->buffer_out[0]; // Transmit first byte |
| #else |
| unsigned char i = 0; |
| LATBbits.LATB7 = 0; |
| SPI_SLAVE_SELECT_LAT = 0; |
| |
| for (i = 0; i < length; i++) { |
| SSP2BUF = 0x0; |
| 178,7 → 170,7 |
|---|
| } |
| spi_data_p->buffer_in_len++; |
| } |
| LATBbits.LATB7 = 1; |
| SPI_SLAVE_SELECT_LAT = 1; |
| #endif |
| } |
| |