From 8d4296f96430795936a22769da35732e5342b25c Mon Sep 17 00:00:00 2001 From: Scott Shawcroft Date: Tue, 10 Nov 2020 18:02:16 -0800 Subject: Add board.DISPLAY to MagTag. Fix luma computation * Initialize the EPaper display on the MagTag at start. * Tweak the display send to take a const buffer. * Correct Luma math * Multiply the blue component, not add. * Add all of the components together before dividing. This reduces the impact of truncated division. --- shared-module/displayio/I2CDisplay.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'shared-module/displayio/I2CDisplay.c') diff --git a/shared-module/displayio/I2CDisplay.c b/shared-module/displayio/I2CDisplay.c index 5bd03dcd6..cc811e83d 100644 --- a/shared-module/displayio/I2CDisplay.c +++ b/shared-module/displayio/I2CDisplay.c @@ -103,7 +103,8 @@ bool common_hal_displayio_i2cdisplay_begin_transaction(mp_obj_t obj) { return common_hal_busio_i2c_try_lock(self->bus); } -void common_hal_displayio_i2cdisplay_send(mp_obj_t obj, display_byte_type_t data_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length) { +void common_hal_displayio_i2cdisplay_send(mp_obj_t obj, display_byte_type_t data_type, + display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length) { displayio_i2cdisplay_obj_t* self = MP_OBJ_TO_PTR(obj); if (data_type == DISPLAY_COMMAND) { uint8_t command_bytes[2 * data_length]; -- cgit v1.2.3