Other Parts Discussed in Thread: TMS320LF2406A
Hello,
According to the Appendix D of TMS320LF2406A user guide, the DSP should
send 0x03, 0x00, 0x00 to the EEPROM. An MSP430 is used instead of
EEPROM. The MSP430 is configured to 3-pin SPI mode. The user guide did
not mention the exact SPI configuration the EEPROM or an SPI enabled
device should have. I am receiving 0x00, 0xC0,0x00, 0x00... the 0xC0
keep changing to a different value every time the DSP boot loading restarts. I am guessing the SPI configuration is not correct. What is the correct SPI configuration?
Following is the SPI Configuration in :
//============================================================================
// UCB0 Module setup for 3-pin SPI slave mode
// PORT3:
// PIN 1 : SIMO (Slave In Master Out )
// PIN 2 : SOMI (Slave Out Master In )
// PIN 3 : CLK (SPI CLK )
//============================================================================
P3SEL |= 0x0E;
UCB0CTL1 |= UCSWRST; // **Put state machine in reset**
UCB0CTL0 |= UCSYNC + UCCKPL + UCMSB; // 3-pin, 8-bit SPI slave
// Clock polarity high, MSB
UCB0CTL1 |= UCSSEL_2; // SMCLK 20MHz
UCB0BR0 = 0x02; // divide by 2
UCB0BR1 = 0; //
UCB0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
UCB0IE |= UCRXIE; // Enable USCI_B0 RX interrupt
// UCB0 Module setup for 3-pin SPI slave mode
// PORT3:
// PIN 1 : SIMO (Slave In Master Out )
// PIN 2 : SOMI (Slave Out Master In )
// PIN 3 : CLK (SPI CLK )
//============================================================================
P3SEL |= 0x0E;
UCB0CTL1 |= UCSWRST; // **Put state machine in reset**
UCB0CTL0 |= UCSYNC + UCCKPL + UCMSB; // 3-pin, 8-bit SPI slave
// Clock polarity high, MSB
UCB0CTL1 |= UCSSEL_2; // SMCLK 20MHz
UCB0BR0 = 0x02; // divide by 2
UCB0BR1 = 0; //
UCB0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
UCB0IE |= UCRXIE; // Enable USCI_B0 RX interrupt
Thanks,
Hummingbird