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Fix SPI issue with latest platform-raspberry #58

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Merged
mkalkbrenner merged 2 commits into from
Sep 25, 2026
+12 −11
Merged

Fix SPI issue with latest platform-raspberry #58

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94f0957
fix SPI header memory issue
PastorL69 Sep 25, 2026
73cbc4a
update to latest platform-raspberrypi
PastorL69 Sep 25, 2026
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4 changes: 2 additions & 2 deletions platformio.ini
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Original file line number Diff line number Diff line change
Expand Up @@ -2,14 +2,14 @@
default_envs = rp2040

[env:rp2040]
platform = https://github.com/maxgerhardt/platform-raspberrypi#79ce473e1a8010ed8096388690222fd2c94858a6
platform = https://github.com/maxgerhardt/platform-raspberrypi/archive/5d4561a05e3b212660ac6fdd3fbfb328d1988aa1.tar.gz
framework = arduino
board = pico
board_build.core = earlephilhower
board_build.filesystem_size = 0.5m

[env:rp2350]
platform = https://github.com/maxgerhardt/platform-raspberrypi#79ce473e1a8010ed8096388690222fd2c94858a6
platform = https://github.com/maxgerhardt/platform-raspberrypi/archive/5d4561a05e3b212660ac6fdd3fbfb328d1988aa1.tar.gz
framework = arduino
board = rpipico2
board_build.core = earlephilhower
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19 changes: 10 additions & 9 deletions src/dmdreader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,9 @@ typedef struct __attribute__((__packed__)) block_pix_header_t {
uint16_t padding; // padding bits
} block_pix_header_t __attribute__((aligned(4)));

block_header_t h = {};
block_pix_header_t ph = {};

DmdType dmd_type;

// Line oversampling
Expand Down Expand Up @@ -257,15 +260,6 @@ void spi_clean_exit() {
* @param pixbuf a frame to send
*/
bool spi_send_pix(uint8_t *pixbuf, bool skip_when_busy) {
block_header_t h = {.block_type = SPI_BLOCK_PIX};
block_pix_header_t ph = {};

// round length to 4-byte blocks
h.len = (((target_bytes + 3) / 4) * 4) + sizeof(h) + sizeof(ph);
ph.columns = source_width;
ph.rows = source_height;
ph.bitsperpixel = target_bitsperpixel;

if (skip_when_busy) {
if (spi_busy()) return false;
}
Expand Down Expand Up @@ -1564,6 +1558,13 @@ void dmdreader_spi_init() {
pinMode(SPI0_CS, OUTPUT);
digitalWrite(SPI0_CS, LOW);

// Set up SPI header
h.len = (((target_bytes + 3) / 4) * 4) + sizeof(h) + sizeof(ph);
h.block_type = SPI_BLOCK_PIX;
ph.columns = source_width;
ph.rows = source_height;
ph.bitsperpixel = target_bitsperpixel;

// initialize SPI slave PIO
dmdreader_error_blink(pio_claim_free_sm_and_add_program_for_gpio_range(
&clocked_output_program, &spi_pio, &spi_sm, &spi_offset, SPI_BASE, 4,
Expand Down
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