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Add reverse_enable for max7219 (#1489)

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Samuel Sieb 2021-02-17 11:26:22 -08:00 committed by Jesse Hills
parent a925036ff8
commit eacac78099
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GPG key ID: BEAAE804EFD8E83A
3 changed files with 11 additions and 3 deletions
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4
esphome/components/max7219/display.py
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@ -9,11 +9,14 @@ max7219_ns = cg.esphome_ns.namespace('max7219')
MAX7219Component = max7219_ns.class_('MAX7219Component', cg.PollingComponent, spi.SPIDevice)
MAX7219ComponentRef = MAX7219Component.operator('ref')
CONF_REVERSE_ENABLE = 'reverse_enable'
CONFIG_SCHEMA = display.BASIC_DISPLAY_SCHEMA.extend({
cv.GenerateID(): cv.declare_id(MAX7219Component),
cv.Optional(CONF_NUM_CHIPS, default=1): cv.int_range(min=1, max=255),
cv.Optional(CONF_INTENSITY, default=15): cv.int_range(min=0, max=15),
cv.Optional(CONF_REVERSE_ENABLE, default=False): cv.boolean,
}).extend(cv.polling_component_schema('1s')).extend(spi.spi_device_schema())
@ -25,6 +28,7 @@ def to_code(config):
cg.add(var.set_num_chips(config[CONF_NUM_CHIPS]))
cg.add(var.set_intensity(config[CONF_INTENSITY]))
cg.add(var.set_reverse(config[CONF_REVERSE_ENABLE]))
if CONF_LAMBDA in config:
lambda_ = yield cg.process_lambda(config[CONF_LAMBDA], [(MAX7219ComponentRef, 'it')],

8
esphome/components/max7219/max7219.cpp
View file

@ -142,9 +142,11 @@ void MAX7219Component::dump_config() {
void MAX7219Component::display() {
for (uint8_t i = 0; i < 8; i++) {
this->enable();
for (uint8_t j = 0; j < this->num_chips_; j++) {
this->send_byte_(8 - i, this->buffer_[j * 8 + i]);
}
for (uint8_t j = 0; j < this->num_chips_; j++)
if (reverse_)
this->send_byte_(8 - i, buffer_[(num_chips_ - j - 1) * 8 + i]);
else
this->send_byte_(8 - i, buffer_[j * 8 + i]);
this->disable();
}
}

2
esphome/components/max7219/max7219.h
View file

@ -34,6 +34,7 @@ class MAX7219Component : public PollingComponent,
void set_intensity(uint8_t intensity);
void set_num_chips(uint8_t num_chips);
void set_reverse(bool reverse) { this->reverse_ = reverse; };
/// Evaluate the printf-format and print the result at the given position.
uint8_t printf(uint8_t pos, const char *format, ...) __attribute__((format(printf, 3, 4)));
@ -60,6 +61,7 @@ class MAX7219Component : public PollingComponent,
uint8_t intensity_{15}; /// Intensity of the display from 0 to 15 (most)
uint8_t num_chips_{1};
uint8_t *buffer_;
bool reverse_{false};
optional<max7219_writer_t> writer_{};
};