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Add EIND setting for chips with more than 128k flash.

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Untabify and fix some comment formatting.
This commit is contained in:
WestfW
2020-05-29 18:20:26 -07:00
parent 345955996d
commit 243ee94ffa
1 changed files with 31 additions and 16 deletions
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37
optiboot/examples/test_dospm/optiboot.h
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@@ -10,7 +10,7 @@
| There are 5 convenient functions available here: | | There are 5 convenient functions available here: |
| * optiboot_page_erase - to erase a FLASH page | | * optiboot_page_erase - to erase a FLASH page |
| * optiboot_page_fill - to put words into temporary buffer | | * optiboot_page_fill - to put words into temporary buffer |
| * optiboot_page_write - to write contents of temporary buffer into FLASH | | | * optiboot_page_write - to write contents of temporary buffer into FLASH |
| * optiboot_readPage - higher level function to read a flash page and | | * optiboot_readPage - higher level function to read a flash page and |
| store it in an array | | store it in an array |
| * optiboot_writePage - higher level function to write content to | | * optiboot_writePage - higher level function to write content to |
@@ -39,7 +39,8 @@
* *
*/ */
// 'typedef' (in following line) and 'const' (few lines below) are a way to define external function at some arbitrary address // 'typedef' (in following line) and 'const' (few lines below)
// are a way to define external function at some arbitrary address
typedef void (*do_spm_t)(uint16_t address, uint8_t command, uint16_t data); typedef void (*do_spm_t)(uint16_t address, uint8_t command, uint16_t data);
@@ -74,12 +75,21 @@ void do_spm_cli(optiboot_addr_t address, uint8_t command, uint16_t data) {
sreg_save = SREG; // save old SREG value sreg_save = SREG; // save old SREG value
asm volatile("cli"); // disable interrupts asm volatile("cli"); // disable interrupts
#ifdef RAMPZ #ifdef RAMPZ
RAMPZ = (address >> 16) & 0xff; // address bits 23-16 goes to RAMPZ RAMPZ = (address >> 16) & 0xff; // address bits 23-16 goes to RAMPZ
do_spm((address & 0xffff), command, data); // do_spm accepts only lower 16 bits of address #ifdef EIND
#else uint8_t eind = EIND;
do_spm(address, command, data); // 16 bit address - no problems to pass directly EIND = FLASHEND / 0x20000;
#endif #endif
// do_spm accepts only lower 16 bits of address
do_spm((address & 0xffff), command, data);
#ifdef EIND
EIND = eind;
#endif
#else
// 16 bit address - no problems to pass directly
do_spm(address, command, data);
#endif
SREG = sreg_save; // restore last interrupts state SREG = sreg_save; // restore last interrupts state
} }
@@ -109,7 +119,9 @@ void optiboot_page_write(optiboot_addr_t address) {
*/ */
// Function to read a flash page and store it in an array (storage_array[]) // Function to read a flash page and store it in an array (storage_array[])
void optiboot_readPage(const uint8_t allocated_flash_space[], uint8_t storage_array[], uint16_t page, char blank_character) void optiboot_readPage(const uint8_t allocated_flash_space[],
uint8_t storage_array[], uint16_t page,
char blank_character)
{ {
uint8_t read_character; uint8_t read_character;
for(uint16_t j = 0; j < SPM_PAGESIZE; j++) for(uint16_t j = 0; j < SPM_PAGESIZE; j++)
@@ -123,8 +135,10 @@ void optiboot_readPage(const uint8_t allocated_flash_space[], uint8_t storage_ar
} }
// Function to read a flash page and store it in an array (storage_array[]), but without blank_character // Function to read a flash page and store it in an array (storage_array[]),
void optiboot_readPage(const uint8_t allocated_flash_space[], uint8_t storage_array[], uint16_t page) // but without blank_character
void optiboot_readPage(const uint8_t allocated_flash_space[],
uint8_t storage_array[], uint16_t page)
{ {
uint8_t read_character; uint8_t read_character;
for(uint16_t j = 0; j < SPM_PAGESIZE; j++) for(uint16_t j = 0; j < SPM_PAGESIZE; j++)
@@ -137,7 +151,8 @@ void optiboot_readPage(const uint8_t allocated_flash_space[], uint8_t storage_ar
// Function to write data to a flash page // Function to write data to a flash page
void optiboot_writePage(const uint8_t allocated_flash_space[], uint8_t data_to_store[], uint16_t page) void optiboot_writePage(const uint8_t allocated_flash_space[],
uint8_t data_to_store[], uint16_t page)
{ {
uint16_t word_buffer = 0; uint16_t word_buffer = 0;