/*
* mx1_ssi.c
* Functions for Synchronous Serial Interface and CS4340
* By : Jing Zhang
* Date : 2004/06/15
*/
#define MX1_SSI_FLAG
#include "mx1_ssi.h"
#include "mx1_gpio.h"
#include "mx1_scm.h"
#include "error.h"
void MX1_SSI_Init( T_MX1_SSI *ssi_module )
{
if( ssi_module==MX1_SSI1 ){
// Initialize the function muxing register for ssi1 to use gpio port c
MX1_SCM->FMCR |= (SSI_RXFS_SEL_PC3|SSI_RXCLK_SEL_PC4|SSI_RXDAT_SEL_PC5\
|SSI_TXFS_SEL_PC7|SSI_TXCLK_SEL_PC8);
// Initialize the GPIO for SSI
// SSI1_TXCLK
MX1_GPIO_Conf( SSI_GPIO_PORT, 8, FUNC_PRI, DIR_IN, SRC_IN_ANY );
// SSI1_TXFS
MX1_GPIO_Conf( SSI_GPIO_PORT, 7, FUNC_PRI, DIR_IN, SRC_IN_ANY );
// SSI1_TXDAT
MX1_GPIO_Conf( SSI_GPIO_PORT, 6, FUNC_PRI, DIR_OUT, SRC_OUT_ANY );
/////////////////Receive function is not used///////////////////////
// SSI1_RXDAT
//MX1_GPIO_Conf( SSI_GPIO_PORT, 5, FUNC_PRI, DIR_IN, SRC_IN_ANY );
// SSI1_RXCLK
//MX1_GPIO_Conf( SSI_GPIO_PORT, 4, FUNC_PRI, DIR_IN, SRC_IN_ANY );
// SSI1_RXFS
//MX1_GPIO_Conf( SSI_GPIO_PORT, 3, FUNC_PRI, DIR_IN, SRC_IN_ANY );
// Configure the PB17 for RST of cs4340
MX1_GPIO_Conf( MX1_GPIO_PB, 17, FUNC_IO, DIR_OUT, SRC_OUT_DR );
DR_LOW( MX1_GPIO_PB, 17 );
// Configure PC5 for MUTE of CS4340
//MX1_GPIO_Conf( MX1_GPIO_PC, 5, FUNC_IO, DIR_OUT, SRC_OUT_DR );
//DR_HIGH( MX1_GPIO_PC, 5 );
// Initialize the SSI
// Enable SSI
ssi_module->SCSR |= (SCSR_SSI_ENABLE);
// Enable Network mode, Disable transmit
ssi_module->SCSR |= (SCSR_NET_NETWORK|SCSR_TE_DISABLE);
// Disable DMA, Disable transmit interrupt, Enable transmit FIFO, frame sync generated externally,
// External source must drive SSI_TXCLK, MSB transmitted first, ...
ssi_module->STCR |= (STCR_TDMAE_DISABLE|STCR_TIE_DISABLE|STCR_TFEN_ENABLE|STCR_TFDIR_EXT\
|STCR_TXDIR_EXT|STCR_TSHFD_MSB|STCR_TSCKP_FALLING|STCR_TFSI_LOW );
// Configure the transmit clock configuration register
ssi_module->STCCR |= (STCCR_PSR_BYPASS|STCCR_WL_16|STCCR_DC(1)|STCCR_PM(0));
// Configure FIFO WATER MARK
ssi_module->SFCSR |= (SFCSR_TFWM(8));
// Enable SSI Transmit
ssi_module->SCSR |= (SCSR_TE_ENABLE);
// Reset CS4340
CS4340_RESET();
}else{
ERROR( "Not implemented yet!" );
return;
}
}
void MX1_SSI_Write( T_MX1_SSI *ssi_module, unsigned int val )
{
while( SFCSR_TFCNT(ssi_module)>=8 );
ssi_module->STX = val;
}
