From 8f7b23cea60eca5b359897bfc21ed84eb11a7bb5 Mon Sep 17 00:00:00 2001
From: root <root@no.no.james.local>
Date: Mon, 7 Sep 2015 23:40:11 +0100
Subject: fish

---
 crypto/Makefile            |   3 ++
 crypto/gt22l16a1y.c        | 109 +++++++++++++++++++++++++++++++++++++++++++++
 crypto/main.c              |   3 ++
 crypto/project.h           |  46 +++++++++++--------
 crypto/prototypes.h        |   6 +++
 crypto/rng.c               |  24 ++++++++++
 crypto/ssd1306.c           |  24 ++++++++--
 docs/GT22L16A1Y_V3.2.pdf   | Bin 0 -> 3483966 bytes
 reverse_engineering/pinmap |  16 +++----
 9 files changed, 202 insertions(+), 29 deletions(-)
 create mode 100644 crypto/gt22l16a1y.c
 create mode 100644 crypto/rng.c
 create mode 100644 docs/GT22L16A1Y_V3.2.pdf

diff --git a/crypto/Makefile b/crypto/Makefile
index 5494a9f..524d603 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -28,6 +28,7 @@ SDKCSRCS= \
 	drivers_nrf/gpiote/nrf_drv_gpiote.c  \
 	drivers_nrf/pstorage/pstorage.c  \
 	drivers_nrf/hal/nrf_delay.c  \
+	drivers_nrf/rng/nrf_drv_rng.c \
 	libraries/uart/retarget.c  \
 	libraries/util/app_error.c  \
 	libraries/util/nrf_assert.c  \
@@ -52,6 +53,8 @@ SDKSSRCS  = toolchain/gcc/gcc_startup_nrf51.s
 
 PROTOSRCS= \
 	ssd1306.c \
+	rng.c \
+	gt22l16a1y.c \
 	main.c 
 
 CSRCS = \
diff --git a/crypto/gt22l16a1y.c b/crypto/gt22l16a1y.c
new file mode 100644
index 0000000..b997c36
--- /dev/null
+++ b/crypto/gt22l16a1y.c
@@ -0,0 +1,109 @@
+#include "project.h"
+
+#define SCLK   17
+#define MOSI   18
+#define NCS    19
+#define MISO   20
+
+#define READ 0x3
+#define FAST_READ 0xb
+
+
+static inline void d(void)
+{
+nrf_delay_us(1);
+}
+
+void
+gt_init (void)
+{
+  NRF_GPIO->PIN_CNF[SCLK] =
+    (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+    (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+    (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+    (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+    (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+
+  NRF_GPIO->PIN_CNF[MOSI] =
+    (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+    (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+    (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+    (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+    (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+
+
+  NRF_GPIO->PIN_CNF[NCS] =
+    (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+    (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+    (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+    (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+    (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+
+
+
+  NRF_GPIO->PIN_CNF[MISO] =
+    (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+    (GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
+    (GPIO_PIN_CNF_PULL_Pulldown << GPIO_PIN_CNF_PULL_Pos) |
+    (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
+    (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+
+
+  NRF_GPIO->DIRSET = (1 << MOSI) | (1 << NCS) | (1<<SCLK);
+  NRF_GPIO->DIRCLR = (1 << MISO);
+
+  NRF_GPIO->OUTSET = (1 << NCS) | (1<<MISO);
+}
+
+void gt_read(uint32_t a,uint8_t * buf,size_t len)
+{
+  uint32_t c;
+  uint8_t v;
+  
+  NRF_GPIO->OUTCLR = (1 << SCLK);
+  d();
+  NRF_GPIO->OUTCLR = (1 << NCS);
+  NRF_GPIO->OUTSET = (1 << NCS);
+  d();
+  
+ a |= READ << 24;
+
+ a=0x3000000;
+ a+=768+80;
+
+  for (c=0x80000000;c;c>>=1) {
+	if (c&a) 
+		  NRF_GPIO->OUTSET = (1 << MOSI);
+	else
+		  NRF_GPIO->OUTCLR = (1 << MOSI);
+  d();
+
+  NRF_GPIO->OUTSET = (1 << SCLK);
+  d();
+  NRF_GPIO->OUTCLR = (1 << SCLK);
+  d();
+  }
+
+  while (len--) {
+	v=0;
+	for (c=0x80;c;c>>=1) {
+	if (NRF_GPIO->IN & (1<<MISO)) v|=c;
+	
+
+
+  NRF_GPIO->OUTSET = (1 << SCLK);
+  d();
+  NRF_GPIO->OUTCLR = (1 << SCLK);
+  d();
+	}
+	*(buf++)=v;
+  }
+
+  d();
+	
+  NRF_GPIO->OUTSET = (1 << NCS);
+  d();
+	
+
+}
+
diff --git a/crypto/main.c b/crypto/main.c
index 4f15694..bab09ab 100644
--- a/crypto/main.c
+++ b/crypto/main.c
@@ -1476,6 +1476,9 @@ int main(void)
     conn_params_init();
     buffer_init();
 
+    rng_init();
+    gt_init();
+
     sd_init();
     sd_on();
 
diff --git a/crypto/project.h b/crypto/project.h
index cf6fac0..79deb31 100644
--- a/crypto/project.h
+++ b/crypto/project.h
@@ -1,32 +1,42 @@
 #include <stdint.h>
 #include <string.h>
-#include <sdk/libraries/util/nordic_common.h>
-#include <sdk/device/nrf.h>
-#include <sdk/libraries/util/nrf_assert.h>
-#include <sdk/libraries/util/app_error.h>
-#include <sdk/drivers_nrf/hal/nrf_gpio.h>
-#include <sdk/device/nrf51_bitfields.h>
-#include <sdk/softdevice/s130/headers/ble.h>
-#include <sdk/softdevice/s130/headers/ble_hci.h>
+
+
+
+#include <sdk/ble/common/ble_advdata.h>
+#include <sdk/ble/common/ble_conn_params.h>
 #include <sdk/ble/common/ble_srv_common.h>
+
 #include <sdk/ble/ble_advertising/ble_advertising.h>
-#include <sdk/ble/common/ble_advdata.h>
-#include <sdk/ble/ble_services/ble_hids/ble_hids.h>
 #include <sdk/ble/ble_services/ble_bas/ble_bas.h>
 #include <sdk/ble/ble_services/ble_dis/ble_dis.h>
-#include <sdk/ble/common/ble_conn_params.h>
-#include "bsp/bsp.h"
+#include <sdk/ble/ble_services/ble_hids/ble_hids.h>
+#include <sdk/ble/device_manager/device_manager.h>
+
+#include <sdk/device/nrf.h>
+#include <sdk/device/nrf51_bitfields.h>
+
+#include <sdk/drivers_nrf/hal/nrf_gpio.h>
+#include <sdk/drivers_nrf/hal/nrf_delay.h>
+#include <sdk/drivers_nrf/pstorage/pstorage.h>
+#include <sdk/drivers_nrf/rng/nrf_drv_rng.h>
+
+#include <sdk/libraries/button/app_button.h>
 #include <sdk/libraries/sensorsim/sensorsim.h>
-#include "bsp/bsp_btn_ble.h"
 #include <sdk/libraries/scheduler/app_scheduler.h>
-#include <sdk/softdevice/common/softdevice_handler/softdevice_handler_appsh.h>
 #include <sdk/libraries/timer/app_timer_appsh.h>
-#include <sdk/ble/device_manager/device_manager.h>
-#include <sdk/libraries/button/app_button.h>
-#include <sdk/drivers_nrf/pstorage/pstorage.h>
 #include <sdk/libraries/trace/app_trace.h>
-#include <sdk/drivers_nrf/hal/nrf_delay.h>
+#include <sdk/libraries/util/app_error.h>
+#include <sdk/libraries/util/nordic_common.h>
+#include <sdk/libraries/util/nrf_assert.h>
 
+#include <sdk/softdevice/common/softdevice_handler/softdevice_handler_appsh.h>
+#include <sdk/softdevice/s130/headers/ble.h>
+#include <sdk/softdevice/s130/headers/ble_hci.h>
+
+
+#include "bsp/bsp.h"
+#include "bsp/bsp_btn_ble.h"
 
 
 #include "prototypes.h"
diff --git a/crypto/prototypes.h b/crypto/prototypes.h
index 35c8abe..ddff112 100644
--- a/crypto/prototypes.h
+++ b/crypto/prototypes.h
@@ -2,6 +2,12 @@
 extern void sd_on(void);
 extern void sd_doodle(void);
 extern void sd_init(void);
+/* rng.c */
+extern uint8_t random_vector_generate(uint8_t *p_buff, uint8_t size);
+extern void rng_init(void);
+/* gt22l16a1y.c */
+extern void gt_init(void);
+extern void gt_read(uint32_t a, uint8_t *buf, size_t len);
 /* main.c */
 extern void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name);
 extern int main(void);
diff --git a/crypto/rng.c b/crypto/rng.c
new file mode 100644
index 0000000..779a106
--- /dev/null
+++ b/crypto/rng.c
@@ -0,0 +1,24 @@
+#include "project.h"
+
+
+
+
+uint8_t random_vector_generate(uint8_t * p_buff, uint8_t size)
+{
+    uint8_t available;
+    uint32_t err_code;
+    err_code = nrf_drv_rng_bytes_available(&available);
+    APP_ERROR_CHECK(err_code);
+    uint8_t length = (size<available) ? size : available;
+    err_code = nrf_drv_rng_rand(p_buff,length);
+    APP_ERROR_CHECK(err_code);
+    return length;
+}
+
+
+void rng_init(void)
+{
+    uint32_t err_code;
+    err_code = nrf_drv_rng_init(NULL);
+    APP_ERROR_CHECK(err_code);
+}
diff --git a/crypto/ssd1306.c b/crypto/ssd1306.c
index 95cab2d..7421669 100644
--- a/crypto/ssd1306.c
+++ b/crypto/ssd1306.c
@@ -14,7 +14,7 @@
 static void
 i2c_delay ()
 {
-  nrf_delay_us (10000);
+  nrf_delay_us (1);
 }
 
 static void
@@ -306,9 +306,27 @@ sd_on (void)
 void
 sd_doodle (void)
 {
-  static uint8_t i;
+  static uint8_t d[8];
+  random_vector_generate(d,1);
+  uint32_t a;
 
-  sd_dat (i++);
+
+  a=d[0];
+  a%=63;
+  a*=8;
+  a+=768;
+
+  gt_read(a,d,sizeof(d));
+
+
+  sd_dat (d[0]);
+  sd_dat (d[1]);
+  sd_dat (d[2]);
+  sd_dat (d[3]);
+  sd_dat (d[4]);
+  sd_dat (d[5]);
+  sd_dat (d[6]);
+  sd_dat (d[7]);
 }
 
 
diff --git a/docs/GT22L16A1Y_V3.2.pdf b/docs/GT22L16A1Y_V3.2.pdf
new file mode 100644
index 0000000..fdebbf8
Binary files /dev/null and b/docs/GT22L16A1Y_V3.2.pdf differ
diff --git a/reverse_engineering/pinmap b/reverse_engineering/pinmap
index b7692e9..bbc0601 100644
--- a/reverse_engineering/pinmap
+++ b/reverse_engineering/pinmap
@@ -149,11 +149,11 @@ G chip
 .
 1 2 3 4
 
-1 -> GND
-2 -> ?
-3 -> P0.18
-4 -> P0.17
-5 -> pulled up
-6 -> VCC
-7 -> P0.19
-8 -> P0.20
+1 -> GND	GND	
+2 -> ?		GND
+3 -> P0.18	MOSI
+4 -> P0.17	SCLK
+5 -> pulled up	HOLD#
+6 -> VCC	VCC
+7 -> P0.19	CS#
+8 -> P0.20	MISO
-- 
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