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lcd.t
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local gd32=require"gd32"
local gpio=require"gpio"
local timer=require"timer"
local cs=gpio.B_2
local dc=gpio.B_0
local rst=gpio.B_1
local blk=gpio.B_0
local spi_h=require"include"("gd32vf103_spi.h",gd32.incf)
local SPI0=spi_h.value("SPI0","uint32_t")
local SPI_FLAG_TBE=spi_h.value("SPI_FLAG_TBE","uint32_t")
local SPI_FLAG_RBNE=spi_h.value("SPI_FLAG_RBNE","uint32_t")
local lcd={}
local w=160
local h=80
local terra write_bus(data:uint8)
cs.set(false)
while 0 == gd32.spi.spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) do end
gd32.spi.spi_i2s_data_transmit(SPI0, data)
while 0 == gd32.spi.spi_i2s_flag_get(SPI0, SPI_FLAG_RBNE) do end
gd32.spi.spi_i2s_data_receive(SPI0);
cs.set(true)
end
local terra wr_data8(data:uint8)
dc.set(true)
write_bus(data)
end
local terra wr_data(data:uint16)
dc.set(true)
write_bus(data>>8)
write_bus(data)
end
local terra wr_reg(data:uint8)
dc.set(false)
write_bus(data)
end
local terra wr_addr_set(x1:uint16,y1:uint16,x2:uint16,y2:uint16)
wr_reg(0x2a)
wr_data(x1+1)
wr_data(x2+1)
wr_reg(0x2b)
wr_data(y1+26)
wr_data(y2+26)
wr_reg(0x2c)
end
struct spi_parameter_struct {
device_mode: uint32
trans_mode: uint32
frame_size: uint32
nss: uint32
endian: uint32
clock_polarity_phase: uint32
prescale: uint32
}
local terra spi_init()
var spi_init_struct:spi_parameter_struct
cs.set(true)
gd32.spi.spi_struct_para_init([&gd32.spi.spi_parameter_struct](&spi_init_struct));
spi_init_struct.trans_mode = [spi_h.value("SPI_TRANSMODE_FULLDUPLEX","uint32_t")]
spi_init_struct.device_mode = [spi_h.value("SPI_MASTER","uint32_t")]
spi_init_struct.frame_size = [spi_h.value("SPI_FRAMESIZE_8BIT","uint32_t")]
spi_init_struct.clock_polarity_phase = [spi_h.value("SPI_CK_PL_HIGH_PH_2EDGE","uint32_t")]
spi_init_struct.nss = [spi_h.value("SPI_NSS_SOFT","uint32_t")]
spi_init_struct.prescale = [spi_h.value("SPI_PSC_8","uint32_t")]
spi_init_struct.endian = [spi_h.value("SPI_ENDIAN_MSB","uint32_t")]
gd32.spi.spi_init(SPI0, [&gd32.spi.spi_parameter_struct](&spi_init_struct));
gd32.spi.spi_crc_polynomial_set(SPI0,7);
gd32.spi.spi_enable(SPI0);
end
terra lcd.init()
gd32.rcu.rcu_periph_clock_enable([gd32.rcu["RCU_AF"]])
gd32.rcu.rcu_periph_clock_enable([gd32.rcu["RCU_SPI0"]])
gpio.A.enable()
gpio.B.enable()
gpio.A_5.alternate()
gpio.A_6.alternate()
gpio.A_7.alternate()
gpio.B_2.alternate()
spi_init()
gpio.B_0.output()
gpio.B_1.output()
gpio.B_0.set(false)
gpio.B_1.set(false)
rst.set(false)
timer.delay(200)
rst.set(true)
timer.delay(20)
wr_reg(0x11)
timer.delay(100)
wr_reg(0x21)
wr_reg(0xb1)
wr_data8(0x05)
wr_data8(0x3a)
wr_data8(0x3a)
wr_reg(0xb2)
wr_data8(0x05)
wr_data8(0x3a)
wr_data8(0x3a)
wr_reg(0xb3)
wr_data8(0x05)
wr_data8(0x3a)
wr_data8(0x3a)
wr_data8(0x05)
wr_data8(0x3a)
wr_data8(0x3a)
wr_reg(0xb4)
wr_data8(0x04)
wr_reg(0xc0)
wr_data8(0x62)
wr_data8(0x02)
wr_data8(0x04)
wr_reg(0xc1)
wr_data8(0xc0)
wr_reg(0xc2)
wr_data8(0x0d)
wr_data8(0x00)
wr_reg(0xc3)
wr_data8(0x8d)
wr_data8(0x6a)
wr_reg(0xc4)
wr_data8(0x8d)
wr_data8(0xee)
wr_reg(0xc5)
wr_data8(0x0e)
wr_reg(0xe0)
wr_data8(0x10)
wr_data8(0x0e)
wr_data8(0x02)
wr_data8(0x03)
wr_data8(0x0e)
wr_data8(0x07)
wr_data8(0x02)
wr_data8(0x07)
wr_data8(0x0a)
wr_data8(0x12)
wr_data8(0x27)
wr_data8(0x37)
wr_data8(0x00)
wr_data8(0x0d)
wr_data8(0x0e)
wr_data8(0x10)
wr_reg(0xe1)
wr_data8(0x10)
wr_data8(0x0e)
wr_data8(0x03)
wr_data8(0x03)
wr_data8(0x0f)
wr_data8(0x06)
wr_data8(0x02)
wr_data8(0x08)
wr_data8(0x0a)
wr_data8(0x13)
wr_data8(0x26)
wr_data8(0x36)
wr_data8(0x00)
wr_data8(0x0d)
wr_data8(0x0e)
wr_data8(0x10)
wr_reg(0x3a)
wr_data8(0x05)
wr_reg(0x36)
wr_data8(0x78)
wr_reg(0x29)
end
terra lcd.clear()
wr_addr_set(0,0,w-1,h-1)
for i=1,w*h do
wr_data(0x0000)
end
end
terra lcd.convert_color(r:uint8,g:uint8,b:uint8):uint16
var rv:uint16=r>>3
var gv:uint16=g>>2
var bv:uint16=b>>3
return (bv or (gv<<5) or (rv<<11))
end
terra lcd.paint_char(x:uint16,y:uint16,char:&uint16)
wr_addr_set(x,y,x+14,y+15)
for y=0,15 do
for x=0,15 do
var val:uint8=0
if (char[y] and (1<<x))~=0 then
val=255
end
wr_data(lcd.convert_color(val,val,val))
end
end
end
terra lcd.paint(state:uint32)
wr_addr_set(0,0,w-2,h-1)
for y=1,h do
for x=1,w do
var r2=((x-80)*(x-80))+((y-40)*(y-40))
if r2<((state*state)/(8*8)) then
wr_data(lcd.convert_color(255,0,0))
elseif r2<((255*255)/(8*8)) then
wr_data(0xffff)
else
wr_data(0x0000)
end
end
end
end
return lcd