def disp_spi_send(self, data):
if len(data) == 0: return # no need to send anything
self.trans.length = len(
data) * 8 # Length is in bytes, transaction length is in bits.
self.trans.tx_buffer = data
esp.spi_device_queue_trans(self.spi, self.trans, -1)
esp.spi_device_get_trans_result(self.spi, self.trans_res, -1)
def xpt_cmds(self, cmds):
cmd_count = int(len(cmds))
for i in range(0, cmd_count):
self.trans[i].cmd = cmds[i]
esp.spi_device_queue_trans(self.spi, self.trans[i], -1)
result = []
for i in range(0, cmd_count):
esp.spi_device_get_trans_result(self.spi, self.trans_result_ptr,
-1)
buf = self.trans[i].rx_buffer.__dereference__(2)
value = (int(buf[0]) << 4) + (int(
buf[1]) >> 4) # value is in the 12 higher bits, network order
if value == int(self.MAX_RAW_COORD):
value = 0
result.append(value)
return tuple(result)
def deinit(self):
print("Deinitializing XPT2046...")
if self.spi:
# Pop all pending transaction results
ret = 0
while ret == 0:
ret = esp.spi_device_get_trans_result(self.spi,
self.trans_result_ptr, 1)
# Remove device
esp.spi_bus_remove_device(self.spi)
# Free SPI bus
esp.spi_bus_free(self.spihost)
def deinit(self):
print('Deinitializing {}..'.format(self.display_name))
self.disp_drv.remove()
# Prevent callbacks to lvgl, which refer to the buffers we are about to delete
if not self.asynchronous:
import lvesp32
lvesp32.deinit()
if self.spi:
# Pop all pending transaction results
ret = 0
while ret == 0:
ret = esp.spi_device_get_trans_result(self.spi,
self.trans_result_ptr, 1)
# Remove device
esp.spi_bus_remove_device(self.spi)
self.spi = None
# Free SPI bus
esp.spi_bus_free(self.spihost)
self.spihost = None
# Free RAM
if self.buf1:
esp.heap_caps_free(self.buf1)
self.buf1 = None
if self.buf2:
esp.heap_caps_free(self.buf2)
self.buf2 = None
if self.trans_buffer:
esp.heap_caps_free(self.trans_buffer)
self.trans_buffer = None
def deinit(self):
print('Deinitializing ILI9341..')
# Prevent callbacks to lvgl, which refer to the buffers we are about to delete
lvesp32.deinit()
if self.spi:
# Pop all pending transaction results
ret = 0
while ret == 0:
ret = esp.spi_device_get_trans_result(self.spi,
self.trans_result_ptr, 1)
# Remove device
esp.spi_bus_remove_device(self.spi)
self.spi = None
# Free SPI bus
esp.spi_bus_free(self.spihost)
self.spihost = None
# Free RAM
if self.buf1:
esp.heap_caps_free(self.buf1)
self.buf1 = None
if self.buf2:
esp.heap_caps_free(self.buf2)
self.buf2 = None
if self.trans_buffer:
esp.heap_caps_free(self.trans_buffer)
self.trans_buffer = None
