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Reduced stack usage in showBootLogoIfavailable().

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Introduced new function OLED::drawAreaSwapped() for drawing images where
the octets are reveresed endianess in 16-bit words.
This commit is contained in:
fatcookies
2020-01-16 21:58:02 +00:00
parent 1ca87a4241
commit 0591a01c5a
3 changed files with 52 additions and 22 deletions
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34
workspace/TS100/Core/Src/main.cpp
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@@ -283,31 +283,21 @@ void startMOVTask(void const *argument __unused) {
#define FLASH_LOGOADDR \
(0x8000000 | 0xF800) /*second last page of flash set aside for logo image*/
/* The header value is (0xAA,0x55,0xF0,0x0D) but is stored in little endian 16
* bits words on the flash */
const uint8_t LOGO_HEADER_VALUE[] = {0x55, 0xAA, 0x0D, 0xF0};
bool showBootLogoIfavailable() {
// check if the header is there (0xAA,0x55,0xF0,0x0D)
// If so display logo
// TODO REDUCE STACK ON THIS ONE, USE DRAWING IN THE READ LOOP
uint16_t temp[98];
uint8_t *header = (uint8_t*) (FLASH_LOGOADDR);
for (uint8_t i = 0; i < (98); i++) {
temp[i] = *(uint16_t*) (FLASH_LOGOADDR + (i * 2));
}
uint8_t temp8[98 * 2];
for (uint8_t i = 0; i < 98; i++) {
temp8[i * 2] = temp[i] >> 8;
temp8[i * 2 + 1] = temp[i] & 0xFF;
}
// check if the header is correct.
for(int i = 0; i < 4; i++) {
if(header[i] != LOGO_HEADER_VALUE[i]) {
return false;
}
}
if (temp8[0] != 0xAA)
return false;
if (temp8[1] != 0x55)
return false;
if (temp8[2] != 0xF0)
return false;
if (temp8[3] != 0x0D)
return false;
OLED::drawArea(0, 0, 96, 16, (uint8_t*) (temp8 + 4));
OLED::drawAreaSwapped(0, 0, 96, 16, (uint8_t*) (FLASH_LOGOADDR + 4));
OLED::refresh();
return true;
}