SSD1306 OLED display driver 1.8.2 This library is developed to control SSD1306/SSD1331/SSD1351/IL9163/PCD8554 RGB i2c/spi LED displays

ssd1306_spi_usi.c
1 /*
2 MIT License
3
4 Copyright (c) 2018, Alexey Dynda
5
6 Permission is hereby granted, free of charge, to any person obtaining a copy
7 of this software and associated documentation files (the "Software"), to deal
8 in the Software without restriction, including without limitation the rights
9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 copies of the Software, and to permit persons to whom the Software is
11 furnished to do so, subject to the following conditions:
12
13 The above copyright notice and this permission notice shall be included in all
14 copies or substantial portions of the Software.
15
16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 SOFTWARE.
23 */
24
25 #include "ssd1306_spi_usi.h"
26 #include "ssd1306_spi.h"
27
28 #include "intf/ssd1306_interface.h"
29 #include "lcd/lcd_common.h"
30 #include "ssd1306_hal/io.h"
31
32 #if defined(CONFIG_USI_SPI_AVAILABLE) && defined(CONFIG_USI_SPI_ENABLE)
33
34 #include <stdlib.h>
35 #include <util/atomic.h>
36
37 #define PORT_SPI PORTB
38 #define DDR_SPI DDRB
39 #define DD_DI DDB0
40 #define DD_DO DDB1
41 #define DD_SCK DDB2
42
43 static void ssd1306_spiConfigure_Usi()
44 {
45 DDR_SPI |= (1<<DD_DO); // as output (DO) - data out
46 DDR_SPI |= (1<<DD_SCK); // as output (USISCK) - clock
47 /* DI pin is still used by USI, although ssd1306 library doesn't need it */
48 // DDR_SPI &= ~(1<<DD_DI); // as input (DI) - data in
49 // PORT_SPI|= (1<<DD_DI); // pullup on (DI)
50 }
51
52 static void ssd1306_spiClose_Usi()
53 {
54 }
55
56 static void ssd1306_spiStart_Usi()
57 {
58 if (s_ssd1306_cs >= 0)
59 {
60 digitalWrite(s_ssd1306_cs,LOW);
61 }
62 USICR = (0<<USIWM1) | (1<<USIWM0) |
63 (1<<USICS1) | (0<<USICS0) | (1<<USICLK);
64 }
65
66 static void ssd1306_spiSendByte_Usi(uint8_t data)
67 {
68 USIDR = data;
69 USISR = (1<<USIOIF);
70 ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
71 {
72 while ( (USISR & (1<<USIOIF)) == 0 )
73 {
74 USICR |= (1<<USITC);
75 }
76 }
77 }
78
79 static void ssd1306_spiSendBytes_Usi(const uint8_t *buffer, uint16_t size)
80 {
81 while (size--)
82 {
83 USIDR = *buffer;
84 USISR = (1<<USIOIF);
85 ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
86 {
87 while ( (USISR & (1<<USIOIF)) == 0 )
88 {
89 USICR |= (1<<USITC);
90 }
91 }
92 buffer++;
93 };
94 }
95
96 static void ssd1306_spiStop_Usi()
97 {
98 if (s_ssd1306_cs >= 0)
99 {
100 digitalWrite(s_ssd1306_cs, HIGH);
101 }
102 if (ssd1306_lcd.type == LCD_TYPE_PCD8544)
103 {
104 digitalWrite(s_ssd1306_dc, LOW);
105 ssd1306_spiSendByte_Usi( 0x00 ); // Send NOP command to allow last data byte to pass (bug in PCD8544?)
106 // ssd1306 E3h is NOP command
107 }
108 // USICR &= ~((1<<USIWM1) | (1<<USIWM0));
109 }
110
111 void ssd1306_spiInit_Usi(int8_t cesPin, int8_t dcPin)
112 {
113 if (cesPin >=0)
114 {
115 pinMode(cesPin, OUTPUT);
116 digitalWrite(cesPin, HIGH);
117 }
118 if (dcPin >= 0) pinMode(dcPin, OUTPUT);
119 if ((cesPin >= 0) || (dcPin >= 0))
120 {
121 /* Even if CS pin is not used we need still to set it to value passed to the function */
122 s_ssd1306_cs = cesPin;
123 s_ssd1306_dc = dcPin;
124 }
125 ssd1306_spiConfigure_Usi();
126 ssd1306_intf.spi = 1;
127 ssd1306_intf.start = ssd1306_spiStart_Usi;
128 ssd1306_intf.stop = ssd1306_spiStop_Usi;
129 ssd1306_intf.send = ssd1306_spiSendByte_Usi;
130 ssd1306_intf.send_buffer = ssd1306_spiSendBytes_Usi;
131 ssd1306_intf.close = ssd1306_spiClose_Usi;
132 }
133
134 #endif
135
136
s_ssd1306_dc
int8_t s_ssd1306_dc
Definition: ssd1306_spi.c:34
ssd1306_interface_t::send
void(* send)(uint8_t data)
Definition: ssd1306_interface.h:70
lcd_common.h
ssd1306_interface_t::stop
void(* stop)(void)
Definition: ssd1306_interface.h:65
LCD_TYPE_PCD8544
Definition: lcd_common.h:55
io.h
ssd1306_spi.h
ssd1306_interface_t::start
void(* start)(void)
Definition: ssd1306_interface.h:61
ssd1306_interface_t::close
void(* close)(void)
deinitializes internal resources, allocated for interface.
Definition: ssd1306_interface.h:88
ssd1306_spi_usi.h
ssd1306_lcd
ssd1306_lcd_t ssd1306_lcd
Definition: lcd_common.c:33
ssd1306_spiInit_Usi
void ssd1306_spiInit_Usi(int8_t cesPin, int8_t dcPin)
Definition: ssd1306_spi_usi.c:111
ssd1306_intf
ssd1306_interface_t ssd1306_intf
Definition: ssd1306_interface.c:31
ssd1306_interface.h
ssd1306_interface_t::spi
uint8_t spi
Definition: ssd1306_interface.h:57
ssd1306_interface_t::send_buffer
void(* send_buffer)(const uint8_t *buffer, uint16_t size)
Sends bytes to SSD1306 device.
Definition: ssd1306_interface.h:80
ssd1306_lcd_t::type
lcd_type_t type
Definition: lcd_common.h:91
s_ssd1306_cs
int8_t s_ssd1306_cs
Definition: ssd1306_spi.c:33