[2.0.x] Add support for LPC1769 at 120 MHz (#9423)
This commit is contained in:
Thomas Moore
committed by
Scott Lahteine
Scott Lahteine
parent
6ace57e1b0
commit
e1fd9c08b3
@ -47,113 +47,41 @@
|
||||
* https://github.com/MarlinFirmware/Marlin/tree/071c7a78f27078fd4aee9a3ef365fcf5e143531e
|
||||
*/
|
||||
|
||||
#include "src/inc/MarlinConfig.h"
|
||||
|
||||
#ifdef TARGET_LPC1768
|
||||
|
||||
// --------------------------------------------------------------------------
|
||||
// Includes
|
||||
// --------------------------------------------------------------------------
|
||||
|
||||
//#include "../../../MarlinConfig.h" //works except in U8g
|
||||
#include "spi_pins.h"
|
||||
#include "fastio.h"
|
||||
#include "LPC_SPI.h"
|
||||
#include "../SPI.h"
|
||||
|
||||
// --------------------------------------------------------------------------
|
||||
// Public Variables
|
||||
// --------------------------------------------------------------------------
|
||||
|
||||
|
||||
// --------------------------------------------------------------------------
|
||||
// Public functions
|
||||
// --------------------------------------------------------------------------
|
||||
|
||||
#if ENABLED(LPC_SOFTWARE_SPI)
|
||||
// --------------------------------------------------------------------------
|
||||
// software SPI
|
||||
// --------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* This software SPI runs at three rates. The SD software provides an index
|
||||
* (spiRate) of 0-6. The mapping is:
|
||||
* 0-1 - about 5 MHz peak
|
||||
* 2-3 - about 2 MHz peak
|
||||
* all others - about 250 KHz
|
||||
*/
|
||||
#include "SoftwareSPI.h"
|
||||
|
||||
// --------------------------------------------------------------------------
|
||||
// Software SPI
|
||||
// --------------------------------------------------------------------------
|
||||
|
||||
static uint8_t SPI_speed = 0;
|
||||
|
||||
static uint8_t spiTransfer(uint8_t b) {
|
||||
|
||||
if (!SPI_speed) { // fastest - about 5 MHz peak
|
||||
for (int bits = 0; bits < 8; bits++) {
|
||||
if (b & 0x80) {
|
||||
WRITE(MOSI_PIN, HIGH);
|
||||
WRITE(MOSI_PIN, HIGH); // delay to (hopefully) guarantee setup time
|
||||
}
|
||||
else {
|
||||
WRITE(MOSI_PIN, LOW);
|
||||
WRITE(MOSI_PIN, LOW); // delay to (hopefully) guarantee setup time
|
||||
}
|
||||
b <<= 1;
|
||||
WRITE(SCK_PIN, HIGH);
|
||||
if (READ(MISO_PIN)) {
|
||||
b |= 1;
|
||||
}
|
||||
WRITE(SCK_PIN, LOW);
|
||||
}
|
||||
}
|
||||
else if (SPI_speed == 1) { // medium - about 1 MHz
|
||||
for (int bits = 0; bits < 8; bits++) {
|
||||
if (b & 0x80) {
|
||||
for (uint8_t i = 0; i < 9; i++) WRITE(MOSI_PIN, HIGH);
|
||||
}
|
||||
else {
|
||||
for (uint8_t i = 0; i < 9; i++) WRITE(MOSI_PIN, LOW);
|
||||
}
|
||||
b <<= 1;
|
||||
|
||||
for (uint8_t i = 0; i < 7; i++) WRITE(SCK_PIN, HIGH);
|
||||
|
||||
if (READ(MISO_PIN)) {
|
||||
b |= 1;
|
||||
}
|
||||
WRITE(SCK_PIN, LOW);
|
||||
}
|
||||
}
|
||||
else { // slow - about 250 KHz
|
||||
for (int bits = 0; bits < 8; bits++) {
|
||||
if (b & 0x80) {
|
||||
WRITE(MOSI_PIN, HIGH);
|
||||
}
|
||||
else {
|
||||
WRITE(MOSI_PIN, LOW);
|
||||
}
|
||||
b <<= 1;
|
||||
delayMicroseconds(1U);
|
||||
WRITE(SCK_PIN, HIGH);
|
||||
delayMicroseconds(2U);
|
||||
|
||||
if (READ(MISO_PIN)) {
|
||||
b |= 1;
|
||||
}
|
||||
WRITE(SCK_PIN, LOW);
|
||||
delayMicroseconds(1U);
|
||||
}
|
||||
}
|
||||
return b;
|
||||
return swSpiTransfer(b, SPI_speed, SCK_PIN, MISO_PIN, MOSI_PIN);
|
||||
}
|
||||
|
||||
void spiBegin() {
|
||||
SET_OUTPUT(SCK_PIN);
|
||||
SET_INPUT(MISO_PIN);
|
||||
SET_OUTPUT(MOSI_PIN);
|
||||
swSpiBegin(SCK_PIN, MISO_PIN, MOSI_PIN);
|
||||
}
|
||||
|
||||
void spiInit(uint8_t spiRate) {
|
||||
SPI_speed = spiRate >> 1;
|
||||
WRITE(MOSI_PIN, HIGH);
|
||||
WRITE(SCK_PIN, LOW);
|
||||
SPI_speed = swSpiInit(spiRate, SCK_PIN, MOSI_PIN);
|
||||
}
|
||||
|
||||
uint8_t spiRec() {
|
||||
@ -193,20 +121,6 @@
|
||||
WRITE(SS_PIN, HIGH);
|
||||
}
|
||||
|
||||
void SPIClass::begin() { spiBegin(); }
|
||||
|
||||
uint8_t SPIClass::transfer(uint8_t B) {
|
||||
return spiTransfer(B);
|
||||
}
|
||||
uint16_t SPIClass::transfer16(uint16_t data) {
|
||||
uint16_t buffer;
|
||||
buffer = transfer((data>>8) & 0xFF) << 8;
|
||||
buffer |= transfer(data & 0xFF) && 0xFF;
|
||||
return buffer;
|
||||
}
|
||||
|
||||
SPIClass SPI;
|
||||
|
||||
#else
|
||||
|
||||
// hardware SPI
|
||||
@ -221,13 +135,13 @@
|
||||
PinCfg.Funcnum = 2;
|
||||
PinCfg.OpenDrain = 0;
|
||||
PinCfg.Pinmode = 0;
|
||||
PinCfg.Pinnum = LPC1768_PIN_PIN(SCK_PIN);
|
||||
PinCfg.Portnum = LPC1768_PIN_PORT(SCK_PIN);
|
||||
PinCfg.Pinnum = LPC1768_PIN_PIN(SCK_PIN);
|
||||
PinCfg.Portnum = LPC1768_PIN_PORT(SCK_PIN);
|
||||
PINSEL_ConfigPin(&PinCfg);
|
||||
SET_OUTPUT(SCK_PIN);
|
||||
|
||||
PinCfg.Pinnum = LPC1768_PIN_PIN(MISO_PIN);
|
||||
PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
PinCfg.Pinnum = LPC1768_PIN_PIN(MISO_PIN);
|
||||
PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
PINSEL_ConfigPin(&PinCfg);
|
||||
SET_INPUT(MISO_PIN);
|
||||
|
||||
@ -237,10 +151,9 @@ PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
SET_OUTPUT(MOSI_PIN);
|
||||
}
|
||||
|
||||
|
||||
void spiInit(uint8_t spiRate) {
|
||||
|
||||
// table to convert Marlin spiRates (0-5 plus default) into bit rates
|
||||
// table to convert Marlin spiRates (0-5 plus default) into bit rates
|
||||
uint32_t Marlin_speed[7]; // CPSR is always 2
|
||||
Marlin_speed[0] = 8333333; //(SCR: 2) desired: 8,000,000 actual: 8,333,333 +4.2% SPI_FULL_SPEED
|
||||
Marlin_speed[1] = 4166667; //(SCR: 5) desired: 4,000,000 actual: 4,166,667 +4.2% SPI_HALF_SPEED
|
||||
@ -250,11 +163,10 @@ PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
Marlin_speed[5] = 250000; //(SCR: 99) desired: 250,000 actual: 250,000 SPI_SPEED_6
|
||||
Marlin_speed[6] = 125000; //(SCR:199) desired: 125,000 actual: 125,000 Default from HAL.h
|
||||
|
||||
|
||||
// select 50MHz PCLK for SSP0
|
||||
// divide PCLK by 2 for SSP0
|
||||
CLKPWR_SetPCLKDiv(CLKPWR_PCLKSEL_SSP0, CLKPWR_PCLKSEL_CCLK_DIV_2);
|
||||
|
||||
// setup for SPI mode
|
||||
// setup for SPI mode
|
||||
SSP_CFG_Type HW_SPI_init; // data structure to hold init values
|
||||
SSP_ConfigStructInit(&HW_SPI_init); // set values for SPI mode
|
||||
HW_SPI_init.ClockRate = Marlin_speed[MIN(spiRate, 6)]; // put in the specified bit rate
|
||||
@ -285,9 +197,8 @@ PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
void spiSend(uint32_t chan, const uint8_t* buf, size_t n) {
|
||||
}
|
||||
|
||||
|
||||
uint8_t get_one_byte() {
|
||||
// send a dummy byte so can clock in receive data
|
||||
static uint8_t get_one_byte() {
|
||||
// send a dummy byte so can clock in receive data
|
||||
SSP_SendData(LPC_SSP0,0x00FF);
|
||||
while (SSP_GetStatus(LPC_SSP0, SSP_STAT_BUSY)); // wait for it to finish
|
||||
return SSP_ReceiveData(LPC_SSP0) & 0x00FF;
|
||||
@ -312,6 +223,13 @@ PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
}
|
||||
}
|
||||
|
||||
static uint8_t spiTransfer(uint8_t b) {
|
||||
while (SSP_GetStatus(LPC_SSP0, SSP_STAT_RXFIFO_NOTEMPTY) || SSP_GetStatus(LPC_SSP0, SSP_STAT_BUSY)) SSP_ReceiveData(LPC_SSP0); //flush the receive buffer
|
||||
SSP_SendData(LPC_SSP0, b); // send the byte
|
||||
while (SSP_GetStatus(LPC_SSP0, SSP_STAT_BUSY)); // wait for it to finish
|
||||
return SSP_ReceiveData(LPC_SSP0) & 0x00FF;
|
||||
}
|
||||
|
||||
// Write from buffer to SPI
|
||||
void spiSendBlock(uint8_t token, const uint8_t* buf) {
|
||||
}
|
||||
@ -324,5 +242,19 @@ PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
|
||||
|
||||
#endif // ENABLED(LPC_SOFTWARE_SPI)
|
||||
|
||||
void SPIClass::begin() { spiBegin(); }
|
||||
|
||||
uint8_t SPIClass::transfer(uint8_t B) {
|
||||
return spiTransfer(B);
|
||||
}
|
||||
uint16_t SPIClass::transfer16(uint16_t data) {
|
||||
uint16_t buffer;
|
||||
buffer = transfer((data>>8) & 0xFF) << 8;
|
||||
buffer |= transfer(data & 0xFF) && 0xFF;
|
||||
return buffer;
|
||||
}
|
||||
|
||||
SPIClass SPI;
|
||||
|
||||
#endif // TARGET_LPC1768
|
||||
|
||||
|
||||
Reference in New Issue
Block a user