|
|
|
@ -53,7 +53,7 @@
|
|
|
|
// Public functions
|
|
|
|
// Public functions
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
|
|
#if ENABLED(DUE_SOFTWARE_SPI)
|
|
|
|
#if EITHER(DUE_SOFTWARE_SPI, FORCE_SOFT_SPI)
|
|
|
|
|
|
|
|
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
// software SPI
|
|
|
|
// software SPI
|
|
|
|
@ -739,7 +739,42 @@
|
|
|
|
#define SPI_MODE_2_DUE_HW 0
|
|
|
|
#define SPI_MODE_2_DUE_HW 0
|
|
|
|
#define SPI_MODE_3_DUE_HW 1
|
|
|
|
#define SPI_MODE_3_DUE_HW 1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
|
|
|
* The DUE SPI controller is set up so the upper word of the longword
|
|
|
|
|
|
|
|
* written to the transmit data register selects which SPI Chip Select
|
|
|
|
|
|
|
|
* Register is used. This allows different streams to have different SPI
|
|
|
|
|
|
|
|
* settings.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* In practice it's spooky. Some combinations hang the system, while others
|
|
|
|
|
|
|
|
* upset the peripheral device.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* SPI mode should be the same for all streams. The FYSETC_MINI_12864 gets
|
|
|
|
|
|
|
|
* upset if the clock phase changes after chip select goes active.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* SPI_CSR_CSAAT should be set for all streams. If not the WHILE_TX(0)
|
|
|
|
|
|
|
|
* macro returns immediately which can result in the SPI chip select going
|
|
|
|
|
|
|
|
* inactive before all the data has been sent.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* The TMC2130 library uses SPI0->SPI_CSR[3].
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* The U8G hardware SPI uses SPI0->SPI_CSR[0]. The system hangs and/or the
|
|
|
|
|
|
|
|
* FYSETC_MINI_12864 gets upset if lower baud rates are used and the SD card
|
|
|
|
|
|
|
|
* is inserted or removed.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* The SD card uses SPI0->SPI_CSR[3]. Efforts were made to use [1] and [2]
|
|
|
|
|
|
|
|
* but they all resulted in hangs or garbage on the LCD.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* The SPI controlled chip selects are NOT enabled in the GPIO controller.
|
|
|
|
|
|
|
|
* The application must control the chip select.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
* All of the above can be avoided by defining FORCE_SOFT_SPI to force the
|
|
|
|
|
|
|
|
* display to use software SPI.
|
|
|
|
|
|
|
|
*
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
void spiInit(uint8_t spiRate=6) { // Default to slowest rate if not specified)
|
|
|
|
void spiInit(uint8_t spiRate=6) { // Default to slowest rate if not specified)
|
|
|
|
|
|
|
|
// Also sets U8G SPI rate to 4MHz and the SPI mode to 3
|
|
|
|
|
|
|
|
|
|
|
|
// 8.4 MHz, 4 MHz, 2 MHz, 1 MHz, 0.5 MHz, 0.329 MHz, 0.329 MHz
|
|
|
|
// 8.4 MHz, 4 MHz, 2 MHz, 1 MHz, 0.5 MHz, 0.329 MHz, 0.329 MHz
|
|
|
|
constexpr int spiDivider[] = { 10, 21, 42, 84, 168, 255, 255 };
|
|
|
|
constexpr int spiDivider[] = { 10, 21, 42, 84, 168, 255, 255 };
|
|
|
|
if (spiRate > 6) spiRate = 1;
|
|
|
|
if (spiRate > 6) spiRate = 1;
|
|
|
|
@ -760,15 +795,16 @@
|
|
|
|
// TMC2103 compatible setup
|
|
|
|
// TMC2103 compatible setup
|
|
|
|
// Master mode, no fault detection, PCS bits in data written to TDR select CSR register
|
|
|
|
// Master mode, no fault detection, PCS bits in data written to TDR select CSR register
|
|
|
|
SPI0->SPI_MR = SPI_MR_MSTR | SPI_MR_PS | SPI_MR_MODFDIS;
|
|
|
|
SPI0->SPI_MR = SPI_MR_MSTR | SPI_MR_PS | SPI_MR_MODFDIS;
|
|
|
|
// SPI mode 0, 8 Bit data transfer, baud rate
|
|
|
|
// SPI mode 3, 8 Bit data transfer, baud rate
|
|
|
|
SPI0->SPI_CSR[3] = SPI_CSR_SCBR(spiDivider[spiRate]) | SPI_CSR_CSAAT | SPI_MODE_0_DUE_HW; // use same CSR as TMC2130
|
|
|
|
SPI0->SPI_CSR[3] = SPI_CSR_SCBR(spiDivider[spiRate]) | SPI_CSR_CSAAT | SPI_MODE_3_DUE_HW; // use same CSR as TMC2130
|
|
|
|
|
|
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(spiDivider[1]) | SPI_CSR_CSAAT | SPI_MODE_3_DUE_HW; // U8G default to 4MHz
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void spiBegin() { spiInit(); }
|
|
|
|
void spiBegin() { spiInit(); }
|
|
|
|
|
|
|
|
|
|
|
|
static uint8_t spiTransfer(uint8_t data) {
|
|
|
|
static uint8_t spiTransfer(uint8_t data) {
|
|
|
|
WHILE_TX(0);
|
|
|
|
WHILE_TX(0);
|
|
|
|
SPI0->SPI_TDR = (uint32_t)data | 0x00070000UL; // Add TMC2130 PCS bits to every byte
|
|
|
|
SPI0->SPI_TDR = (uint32_t)data | 0x00070000UL; // Add TMC2130 PCS bits to every byte (use SPI0->SPI_CSR[3])
|
|
|
|
WHILE_TX(0);
|
|
|
|
WHILE_TX(0);
|
|
|
|
WHILE_RX(0);
|
|
|
|
WHILE_RX(0);
|
|
|
|
return SPI0->SPI_RDR;
|
|
|
|
return SPI0->SPI_RDR;
|
|
|
|
|
Bob Kuhn
6 years ago
committed by