void spi_set_baud(int port, int baud, SPIOption13 option13, int option3, int option2, int option1) {
if(port >= (NUM_SPIPORTS - 1)) {
return;
}
SET_REG(SPIRegs[port].control, 0);
switch(option13) {
case SPIOption13Setting0:
spi_info[port].option13 = 0;
break;
case SPIOption13Setting1:
spi_info[port].option13 = 1;
break;
case SPIOption13Setting2:
spi_info[port].option13 = 2;
break;
}
spi_info[port].option2 = option2;
spi_info[port].option1 = option1;
uint32_t clockFrequency;
if(spi_info[port].clockSource == PCLK) {
clockFrequency = PeripheralFrequency;
} else {
clockFrequency = FixedFrequency;
}
uint32_t divider;
if(chipid_spi_clocktype() != 0) {
divider = clockFrequency / baud;
if(divider < 2)
divider = 2;
} else {
divider = clockFrequency / (baud * 2 - 1);
}
if(divider > MAX_DIVIDER) {
return;
}
SET_REG(SPIRegs[port].clkDivider, divider);
spi_info[port].baud = baud;
spi_info[port].option3 = option3;
uint32_t options = (option1 << 1)
| (option2 << 2)
| ((option3 ? 0x3 : 0) << 3)
| ((spi_info[port].option5 ? 0x2 : 0x3D) << 5)
| (spi_info[port].clockSource << CLOCK_SHIFT)
| spi_info[port].option13 << 13;
SET_REG(SPIRegs[port].setup, options);
SET_REG(SPIRegs[port].unkReg1, 0);
SET_REG(SPIRegs[port].control, 1);
}
void spi_set_baud(int port, int baud, SPIWordSize wordSize, int isMaster, int isActiveLow, int lastClockEdgeMissing) {
if(port > (NUM_SPIPORTS - 1)) {
return;
}
SET_REG(SPIRegs[port].control, 0);
switch(wordSize) {
case SPIWordSize8:
spi_info[port].wordSize = 0;
break;
case SPIWordSize16:
spi_info[port].wordSize = 1;
break;
case SPIWordSize32:
spi_info[port].wordSize = 2;
break;
}
spi_info[port].isActiveLow = isActiveLow;
spi_info[port].lastClockEdgeMissing = lastClockEdgeMissing;
uint32_t clockFrequency;
if(spi_info[port].clockSource == PCLK) {
clockFrequency = PeripheralFrequency;
} else {
clockFrequency = FixedFrequency;
}
uint32_t divider;
if(chipid_spi_clocktype() != 0) {
divider = clockFrequency / baud;
if(divider < 2)
divider = 2;
} else {
divider = clockFrequency / (baud * 2 - 1);
}
if(divider > MAX_DIVIDER) {
return;
}
SET_REG(SPIRegs[port].clkDivider, divider);
spi_info[port].baud = baud;
spi_info[port].isMaster = isMaster;
uint32_t options = (lastClockEdgeMissing << 1)
| (isActiveLow << 2)
| ((isMaster ? 0x3 : 0) << 3)
| ((spi_info[port].option5 ? 0x2 : 0x3D) << 5)
| (spi_info[port].clockSource << CLOCK_SHIFT)
| spi_info[port].wordSize << 13;
SET_REG(SPIRegs[port].setup, options);
SET_REG(SPIRegs[port].pin, 0);
SET_REG(SPIRegs[port].control, 1);
}
