ManuelW/grbl-LPC-CoreXY
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Added comments throughout code

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This commit is contained in:
B. Perry
2019-04-29 13:47:11 -06:00
parent ac6817f7e2
commit a7ba369987
11 changed files with 209 additions and 206 deletions
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14
grbl-lpc/delay.cpp
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@ -22,11 +22,11 @@
void delay_init()
{
LPC_TIM3->CTCR = 0; // timer mode
LPC_TIM3->PR = 0; // no prescale
LPC_TIM3->MCR = 0; // no MR actions
LPC_TIM3->CCR = 0; // no capture
LPC_TIM3->EMR = 0; // no external match
LPC_TIM3->TCR = 0b10; // reset
LPC_TIM3->TCR = 0b01; // enable
LPC_TIM3->CTCR = 0; // Count Control (0=TimerMode, 1-3=EdgeCounterMode)
LPC_TIM3->PR = 0; // no Prescale (TC increments ever PR+1 clocks)
LPC_TIM3->MCR = 0; // no Match Control actions
LPC_TIM3->CCR = 0; // no Capture Control actions
LPC_TIM3->EMR = 0; // no External Match (controls external match pins)
LPC_TIM3->TCR = 0b10; // reset Timer Control (0b10=Reset, 0b01=Enable)
LPC_TIM3->TCR = 0b01; // enable Timer Control (0b10=Reset, 0b01=Enable)
}

33
grbl-lpc/flash.cpp
View File

@ -25,37 +25,38 @@ static constexpr unsigned flash_addr = 0xF000; // Last 4k sec
static constexpr unsigned flash_size = 1024; // Only using 1k of a 4k sector
static char *flash_memory = (char *)flash_addr; // Flash memory
static char flash_buffer[flash_size] __attribute__((aligned(4))); // Copy of flash memory
using Iap = void(unsigned[], unsigned[]); // IAP entry point
static const Iap *iap = (Iap *)0x1FFF1FF1; // IAP entry point
using Iap = void(unsigned[], unsigned[]); // IAP entry point function
static const Iap *iap = (Iap *)0x1FFF1FF1; // IAP entry point address
void eeprom_init()
{
memcpy(flash_buffer, flash_memory, flash_size);
memcpy(flash_buffer, flash_memory, flash_size); // Copy flash memory into local flash buffer
}
void eeprom_commit()
{
if (!memcmp(flash_buffer, flash_memory, flash_size))
return;
return; // No changes to commit
unsigned prepCommand[5] = {
50,
flash_sector,
flash_sector,
50, // Prepare sector(s) for write operation
flash_sector, // Start sector
flash_sector, // End sector
};
unsigned eraseCommand[5] = {
52,
flash_sector,
flash_sector,
SystemCoreClock / 1000,
52, // Erase sector(s)
flash_sector, // Start sector
flash_sector, // End sector
SystemCoreClock / 1000, // CPU clock frequency in kHz
};
unsigned writeCommand[5] = {
51,
flash_addr,
(unsigned)flash_buffer,
flash_size,
SystemCoreClock / 1000,
51, // Copy RAM to Flash
flash_addr, // Destination flash address (256-byte boundary)
(unsigned)flash_buffer, // Source RAM address (word boundary)
flash_size, // Number of bytes to write (must be: 256, 512, 1024, 4096)
SystemCoreClock / 1000, // CPU clock frequency in kHz
};
unsigned output[5];
// Run In-Application Programming (IAP) routines
iap(prepCommand, output);
iap(eraseCommand, output);
iap(prepCommand, output);