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Merge pull request #370 from Daft-Freak/patch-2 

Small pico unicorn cleanups
This commit is contained in:
Philip Howard 2022-05-23 14:53:45 +01:00 committed by GitHub
parent d6571210a8 8be98da0e5
commit 8d490a6e7c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 10 deletions
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18
libraries/pico_unicorn/pico_unicorn.cpp
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@ -51,13 +51,13 @@ constexpr uint32_t BCD_FRAMES = 15; // includes fet discharge frame
constexpr uint32_t BITSTREAM_LENGTH = (ROW_COUNT * ROW_BYTES * BCD_FRAMES);
// must be aligned for 32bit dma transfer
alignas(4) uint8_t bitstream[BITSTREAM_LENGTH] = {0};
alignas(4) static uint8_t bitstream[BITSTREAM_LENGTH] = {0};
uint16_t r_gamma_lut[256] = {0};
uint16_t g_gamma_lut[256] = {0};
uint16_t b_gamma_lut[256] = {0};
static uint16_t r_gamma_lut[256] = {0};
static uint16_t g_gamma_lut[256] = {0};
static uint16_t b_gamma_lut[256] = {0};
uint32_t dma_channel;
static uint32_t dma_channel;
static inline void unicorn_jetpack_program_init(PIO pio, uint sm, uint offset) {
pio_gpio_init(pio, pin::LED_DATA);
@ -144,13 +144,13 @@ namespace pimoroni {
// gamma correct the provided 0-255 brightness value onto a
// 0-65535 range for the pwm counter
float r_gamma = 2.8f;
r_gamma_lut[v] = (uint16_t)(pow((float)(v) / 255.0f, r_gamma) * 16383.0f + 0.5f);
r_gamma_lut[v] = (uint16_t)(powf((float)(v) / 255.0f, r_gamma) * 16383.0f + 0.5f);
float g_gamma = 2.8f;
g_gamma_lut[v] = (uint16_t)(pow((float)(v) / 255.0f, g_gamma) * 16383.0f + 0.5f);
g_gamma_lut[v] = (uint16_t)(powf((float)(v) / 255.0f, g_gamma) * 16383.0f + 0.5f);
float b_gamma = 2.8f;
b_gamma_lut[v] = (uint16_t)(pow((float)(v) / 255.0f, b_gamma) * 16383.0f + 0.5f);
b_gamma_lut[v] = (uint16_t)(powf((float)(v) / 255.0f, b_gamma) * 16383.0f + 0.5f);
}
// initialise the bcd timing values and row selects in the bitstream
@ -177,7 +177,7 @@ namespace pimoroni {
uint8_t row_select_mask = ~(1 << (7 - row));
bitstream[row_select_offset] = row_select_mask;
uint16_t bcd_ticks = pow(2, frame);
uint16_t bcd_ticks = 1 << frame;
bitstream[bcd_offset + 1] = (bcd_ticks & 0xff00) >> 8;
bitstream[bcd_offset] = (bcd_ticks & 0xff);
}