I everybody, i have a big problem with the DMA and SPI modules, i working with the msp4301611 and i use the module spi0 like a slave 3-wire, th DMA module is configured to the channel 0 for the RX0 and channel 1 for TX0, the module spi1 is configure like master 3-wire.
The problem is that the UTXIFG0 is never clearing by the DMA, in consequence never can transmit my data, but the weird is that for the RX all work fine.
Then i copy and paste my code for the spi0 and DMA configuration to other clean proyect without any modification, surprisingly the code working perfectly.
Here is my code, i have the hope that somebody can help me, anythin comment is always welcome.
This is the code that i use in the clean proyect: /************************************************************/ //******************************************************************************************************* // Inicializacion de DMA //*******************************************************************************************************
void dma0_init(void) { // Setup triggers first DMACTL0 = DMA0TSEL_3 + DMA1TSEL_4; // URXIFG0 UTXIFG0
DMA0SA = U0RXBUF_; // Direccion fuente = UART0 RX Buffer DMA0DA = in_payload_; // Direccion destino = Memoria RAM @0x1100 payload DMA0SZ = 483; // Transferencia de 483 bytes DMA0CTL = DMADT_4 + DMADSTINCR_3 +DMASBDB + DMAEN + DMAIE; // Rep Sng, Dest int, SrcByte-DestByte, DMA0 enable /////////////////////////////////////////////// DMA1SA = out_payload_; DMA1DA = U0TXBUF_; DMA1SZ = 483; DMA1CTL = DMADT_4 + DMASRCINCR_3 +DMASBDB + DMAEN + DMAIE; // Rep Sng, Src int, SrcByte-DestByte, DMA0 enable
}//******************************************************************************************************* // Inicializacion de SPI //******************************************************************************************************* void spi0_init(void) { U0CTL = CHAR + SYNC + SWRST; // 8-bit data, modo SPI, SPI Slave, Software reset // U0CTL = SYNC + SWRST; // 7-bit data, modo SPI, SPI Slave, Software reset U0TCTL = CKPL + SSEL1 + STC; // Data on Falling Edge, SMCLK, 3-wire
U0BR0 = 0x02; // SPICLK set baud U0BR1 = 0x0; // Don't need baud rate control register 2 - clear it U0MCTL = 0x0; // Don't need modulation control
P3SEL = 0x0E; // Selecciona la funcionalizadad SPI para los perifericos P3DIR = 0x0B; // Configura como salidas SIMO,CLK,CSn
ME1 |= USPIE0; // Modulo enable U0CTL &= ~SWRST; // Remove RESET
}#pragma vector=DACDMA_VECTOR __interrupt void DMA(void) { if(DMA0CTL & DMAIFG) { DMA0CTL &= ~DMAIFG; //Borro la bandera }
if(DMA1CTL & DMAIFG) { P2OUT &= ~0x01; DMA1CTL &= ~DMAIFG; //Borro la bandera P2OUT |= 0x01; } }
This is the code that i use for my aplication: //******************************************************************************************************* // Inicializacion de SPI //******************************************************************************************************* void spi_init(void) { //Configuracion del modulo SPI1 para el RF U1CTL = CHAR + SYNC + MM + SWRST; // 8-bit data, modo SPI, SPI master, Software reset U1TCTL = CKPH + SSEL1 + STC; // Data on Rising Edge, SMCLK,
3-wireU1BR0 = 0x02; // SPICLK set baud U1BR1 = 0x0; // Don't need baud rate control register 2 - clear it U1MCTL = 0x0; // Don't need modulation control
P5SEL = 0x0E; // Selecciona la funcionalizadad SPI para los perifericos P5DIR = 0x0B; // Configura como salidas SIMO,CLK,CSn
ME2 |= USPIE1; // Modulo enable U1CTL &= ~SWRST; // Remove RESET
U0CTL = CHAR + SYNC + SWRST; // 8-bit data, modo SPI, SPI Slave, Software reset // U0CTL = SYNC + SWRST; // 7-bit data, modo SPI, SPI Slave, Software reset U0TCTL = CKPL + SSEL1 + STC; // Data on Falling Edge, SMCLK, 3-wire
U0BR0 = 0x02; // SPICLK set baud U0BR1 = 0x0; // Don't need baud rate control register 2 - clear it U0MCTL = 0x0; // Don't need modulation control
P3SEL = 0x0E; // Selecciona la funcionalizadad SPI para los perifericos P3DIR = 0x0B; // Configura como salidas SIMO,CLK,CSn
ME1 |= USPIE0; // Modulo enable U0CTL &= ~SWRST; // Remove RESET } //******************************************************************************************************* // Inicializacion de DMA //******************************************************************************************************* void dma_init(void) {
// Setup triggers first DMACTL0 = DMA0TSEL_3 + DMA1TSEL_4; // URXIFG0 UTXIFG0
DMA0SA = U0RXBUF_; // Direccion fuente = UART0 RX Buffer DMA0DA = 0x14F9; // Direccion destino = Memoria RAM @ payload DMA0SZ = 483; // Transferencia de 483 bytes DMA0CTL = DMADT_4 + DMADSTINCR_3 +DMASBDB + DMAEN + DMAIE; // Rep Sng, Dest int, SrcByte-DestByte, DMA0 enable /////////////////////////////////////////////// DMA1SA = 0x1316; DMA1DA = U0TXBUF_; DMA1SZ = 483; DMA1CTL = DMADT_4 + DMASRCINCR_3 +DMASBDB + DMAEN + DMAIE; // Rep Sng, Src int, SrcByte-DestByte, DMA0 enable
}#pragma vector=DACDMA_VECTOR __interrupt void DMA(void) {
if(DMA0CTL & DMAIFG) { DMA0CTL &= ~DMAIFG; //Borro la bandera }
if(DMA1CTL & DMAIFG) { Data_Voice_out[0].Length = 0; Data_Voice_out[1].Length = 0; Data_Voice_out[2].Length = 0; DMA1CTL &= ~DMAIFG; //Borro la bandera
} }