Hello,
I'm trying to use this litlle board =>
https://www.microchip.com/DevelopmentTools/ProductDetails/DM164143
Impossible to figure out why, I can't make it work with hardware libraries,
either for serial or I2C.
With Serial (both UART 1 and 2): receive correctly but never transmit.
With I2C : program doesn't run at all !
BUT ! On the same pins, Software libraries work fine !
I tried all option I could find reading the datasheet, with no success...
I am not able to test on the chip alone (i.e without the developpement
board) but I doubt this is the point.
Does this MC require the initialization of a special register ?
Thank you for your help!
Here is my code:
--
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%
-- % MPLAB xpress
%
-- % Langage JAL 2.4
%
-- % GBA 08/2019
%
--
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include 16f15376 -- target PICmicro
pragma target clock 20_000_000 -- oscillator frequency
--
pragma target OSC HS -- crystal or resonator
pragma target RSTOSC EXT1X -- power-up clock select:
OSC
pragma target CLKOUTEN DISABLED -- no clock output
pragma target FCMEN DISABLED -- no clock monitoring
pragma target CSWEN ENABLED -- allow writing OSCCON1
NOSC and NDIV
pragma target WDT DISABLED -- watchdog
pragma target BROWNOUT DISABLED -- no brownout reset
pragma target LVP DISABLED -- no low voltage
programming
pragma target MCLR EXTERNAL -- external reset
include delay
include print -- formatted output library
enable_digital_io()
TRISD = 0b00000000 -- RD0 => RD7 : sorties
--
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-- % Déclaration du bus I2C
--
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-- I2C io definition
alias i2c_scl is pin_c3
alias pin_scl_direction is pin_c3_direction
alias i2c_scl_direction is pin_c3_direction
alias i2c_sda is pin_c4
alias pin_sda_direction is pin_c4_direction
alias i2c_sda_direction is pin_c4_direction
-- i2c setup
const word _i2c_bus_speed = 1 ; * 100kHz
const bit _i2c_level = true ; i2c levels (not SMB; i2c_hw only)
include i2c_hardware
-- include i2c_software
i2c_initialize()
--
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-- % FIN Déclaration du bus I2C
--
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--
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-- % Traitement de l'affichage LCD
--
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const byte LCD_ROWS = 2 -- 2 lines
const byte LCD_CHARS = 16 -- 16 chars per line
const byte LCD_ADDRESS = 0x7E -- LCD module I2C address
include lcd_hd44780_pcf8574 -- LCD lib with serial interface
lcd_init() -- initialize LCD
lcd_backlight(on)
procedure lcd_print_at(byte in line, byte in pos, byte in str1[]) is
line = line - 1
pos = pos - 1
lcd_cursor_position(line, pos)
print_string(lcd, str1)
end procedure
lcd_print_at(1, 1, "Bienvenue")
--
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-- % FIN Traitement de l'affichage LCD
--
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--
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-- % Traitement des ports RS232
--
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-- -- Définition des valeurs du port série
alias pin_RX_direction is pin_C7_direction -- Pin 26 for 40 pin DIP
alias pin_RX1_direction is pin_C7_direction
alias pin_TX_direction is pin_C6_direction -- Pin 25 for 40 pin DIP
alias pin_TX1_direction is pin_C6_direction
alias Serial_SW_RX_Pin is pin_C7 -- Pin 26 for 40 pin DIP
alias Serial_SW_TX_Pin is pin_C6 -- Pin 25 for 40 pin DIP
pin_RX_direction = INPUT
pin_TX_direction = OUTPUT
const USART_HW_Serial = TRUE
const Serial_HW_Baudrate = 9600
include Serial_Hardware
Serial_HW_Init
-- const USART_SW_Serial = TRUE
-- const Serial_SW_Baudrate = 9600
-- include Serial_Software
--
-- Serial_SW_Init
alias pin_RX2_direction is pin_B7_direction -- Pin 40 for 40 pin DIP
alias pin_TX2_direction is pin_B6_direction -- Pin 39 for 40 pin DIP
pin_RX2_direction = INPUT
pin_TX2_direction = OUTPUT
const USART_HW2_Serial = TRUE
const serial_hw2_baudrate = 9600
include serial_hardware2
serial_hw2_init
--
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-- % FIN Traitement des ports RS232
--
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Alias LED_CLK is Pin_d4
pin_D4_direction = output -- clock
Alias LED_STB is Pin_d5
pin_D5_direction = output -- strobe
Alias LED_DAT is Pin_d6
pin_D6_direction = output -- data
--
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Procedure Led_Send(Byte*2 In Num) Is
--
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Var Byte*2 Renum = Num
Var Bit d0 at Renum:0
LED_STB = LOW
For 16 Loop
delay_2us
LED_CLK = 0
delay_1us
LED_DAT = d0
delay_1us
LED_CLK = 1
delay_1us
Renum = Renum >> 1
End Loop
LED_STB = HIGH
delay_1us
LED_STB = LOW
End Procedure
for 4 loop
Led_Send(0b1111111111111111)
delay_1ms(100)
Led_Send(0b0000000000000000)
delay_1ms(100)
end loop
var byte strb[1]
var Byte Data_Msg = 0
Forever Loop
Led_Send(0b1000000000000000)
delay_1ms(500)
Led_Send(0b0000000000000000)
delay_1ms(500)
strb[0] = 65
print_string(serial_hw_data, strb)
-- print_string(serial_sw_data, strb)
delay_1ms(10)
end loop
--
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