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/FourWire.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'shared-module/displayio/FourWire.c') diff --git a/shared-module/displayio/FourWire.c b/shared-module/displayio/FourWire.c index 8c56d7ab6..06f8a84e3 100644 --- a/shared-module/displayio/FourWire.c +++ b/shared-module/displayio/FourWire.c @@ -113,7 +113,8 @@ bool common_hal_displayio_fourwire_begin_transaction(mp_obj_t obj) { return true; } -void common_hal_displayio_fourwire_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_fourwire_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_fourwire_obj_t* self = MP_OBJ_TO_PTR(obj); common_hal_digitalio_digitalinout_set_value(&self->command, data_type == DISPLAY_DATA); if (chip_select == CHIP_SELECT_TOGGLE_EVERY_BYTE) { -- cgit v1.2.3